Cars: Sunbeam Alpine

Sunbeam Alpine MKI 1953–54

Page 01
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(Members only)

The Sunbeam Alpine MKI was launched in March 1953. The Alpine is a two door 2-seater sports car which was principally for export to America. The bodies were fabricated by Mulliners of Birmingham.

The Alpine MKI engine was fitted with a 7.42:1 high compression cylinder head which produced 80bhp. The Alpine was also the first Sunbeam to be offered with Laycock de Normanville overdrive as an option (standard for export cars). The Alpine also featured new front seats with wider curved backs which abutted each other above a new centre arm rest which now enclosed the handbrake. The Alpine has detachable side screens and a fully retractable hood which stowed out of sight behind the seats. Production ceased in September 1954, on the introduction of the Sunbeam Alpine MKIII, after 1192 (801 LHD & 391 RHD) had been built.

Body Type

Sports.

Engine

Four-cylinder monobloc, overhead valve type. High-duty light alloy connecting rods, special design detachable high compression head. Steel-backed main and connecting rod bearings. Oil bath air cleaner and silencer. Mechanical petrol pump. A.C. detachable by-pass oil filter with renewable element. Floating filter oil pump intake. Three-bearing crankshaft, full-pressure lubrication. Three-bearing camshaft with harmonic cams. Down-draught carburettor with manually controlled choke giving easy starting- high performance and economy.Cushioned power engine mountings absorb any vibration.

Bore and stroke: 81×110 mm.

Cubic capacity: 2267 c.c. Engine develops 80 b.h.p. at 4200 r.p.m.Standard compression ratio 7.42:1

Ignition

High capacity sports coil and distributor. Automatic advance and retard with hand override control. 14 mm. wide gap, Champion plugs for improved ignition.

Cooling System

Pump and fan, belt driven. Special selective system provides maximum cooling for the hottest parts of the engine, thus maintaining even running temperatures. Automatic thermostatic control. A four-row radiator block is fitted.

Clutch

Borg and Beck single dry plate. Chain linkage to pedal.

Gearbox

Proved four-speed gearbox with control ring synchromesh on Top, 3rd and 2nd gears and finger-tip lever on steering column. Combined dip-stick and filter.
Overall ratios: Top 3.90:1. Third 5.19:1. Second 8.54:1. First 11.04:1. Reverse 13.96:1.

Safety catch for reverse gear prevents accidental engagement.

Rear Axle

Semi-floating design with Hypoid gear final drive. Ratio 3.90:1.

Alternative axle ratio 4.22:1 (an optional extra)

Frame

Complete box-section design of side members giving immense strength and rigidity. Box Section crossmember and ‘I’ section cruciform resist torsional deflection.

Suspension

Independent coil spring suspension at the front and semi-elliptic springs encased in plastic grease sleeves at the rear. The Suspension is controlled by the latest Armstrong hydraulic piston ‘R’ type shock absorbers, To eliminate roll and sway a transverse stabiliser is fitted to the rear and a torsion bar is fitted to the front.

Wheels

Five ‘easi-clean’, disc wheels fitted Rootes Group ‘rimfinishers’. Spare wheel and tyre housed in separate compartment under luggage boot. All wheels are specially balanced.

Tyres

Dunlop extra low pressure, of large section. 5·50×16 in.

Brakes

Latest Lockheed two leading shoe system with hydraulic operation. 10-in. (254 mm.) diameter finned brake drums. Handbrake operates mechanically on rear wheels.

2¼ in. wide linings giving total area of 172 sq. in. ensure high braking efficiency.

Steering

Burman high efficiency variable ration type with 3 spoke steering wheel, raked to give perfect control and comfort.

Petrol Tank

10 gallons capacity tank at rear of chassis.

Electrical System

12 volt, 51 amp. hours, Lucas battery housed under bonnet. Powerful starter operated by Solenoid button control on facia. Lucas ventilated dynamo with automatically regulated output. Two powerful flush-fitting sealed reflector headlamps with dipper control. Separate side lamps. Built-in twin tail lamps incorporating twin stop lamps operated by brake pedal pressure. Independent illumination for rear number plate. Instrument panel has concealed lighting. Dual wind tone horns. Lucas twin-blade windscreen wipers with single master control.

Bumpers

Full-width chromium wrap-around bumpers with overriders are fitted at the front and rear

Four Corner Jacking System

Mechanical jack fitting into permanent sockets on chassis frame.

Tool Kit

Neat compact case of smaller tools, spanners, etc., contained in special locker in front compartment. Larger tools, including large tyre pump and jack, are housed in felt-lined receptacle in rear locker lid.

Wheelbase…   …   …   …97½ in.2476 mm.
Front track…   …   …   …47½ in.1206 mm.
Rear track…   …   …   …50½ in.1283 mm.
Ground clearance…   …   …   …6⅝ in.168 mm.
Turning circle…   …   …   …36 ft.11 m.
Overall length…   …   …   …168 in.4267 mm.
Overall width…   …   …   …62½ in.1587 mm.
Weights, approx. (Sports Saloon and Sports Convertible Coupe)
Unladen (with petrol and water)…   …   …   …2900 lbs.
2 passengers and 150 lbs of luggage …   …   …   …3350 lbs.
Colour Schemes

Alpine Mist with special Bright Red upholstery
Ivory with special Bright Read upholstery
Coronation Red with extra Light Fawn upholstery
Sapphire Blue with extra Light Fawn upholstery

Note: All wheels finished in body colour except for Ivory which had Bright Red

Optional Accessories

Heater and Ventilating Equipment. Radio. Cockpit Cover. Revolution Counter. Badge Bar. Cigarette Lighter. Exterior Door Mirror. Screen Washing Equipment. Racing Windscreens. Loose Seat Covers. White-wall Tyres.


Sunbeam Alpine MKI Special 1953–54

Page 1
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(Members only)

Introduced with the Sunbeam Alpine MKI, the Special was a high performance Sunbeam Alpine principally for competitive driving and rallies. The six Rootes Works Team cars were among the first Specials built. The Special was developed by ERA and had a further modified cylinder head with larger inlet valves and an 8.0:1 compression ratio producing 97.5bhp. The modifications to the engine included the exhaust and inlet manifolds and a twin choke Solex 40 PII carburettor, complete with centrifugal air cleaner with fish tail inlet. A Burgess straight through silencer was also fitted and overdrive was standard. Production ceased in September 1954, after 90 had been built.

Body Type

Sports.

Engine

Four-cylinder monobloc, overhead valve type. High-duty light alloy connecting rods. Steel-backed main and connecting rod bearings. Mechanical petrol pump. A.C. detachable by-pass oil filter with renewable element. Floating filter oil pump intake. Three-bearing crankshaft, full-pressure lubrication. Three-bearing camshaft with harmonic cams. Special Twin-Choke Down-draught carburettor with manually controlled choke. Cushioned power engine mountings absorb any vibration. Bore and stroke: 81×110 mm giving a cubic capacity: 2267 c.c.

Special Engine Modifications

High Compression Cylinder Head with Open-up Inlet Ports, Larger Diameter Inlet Valves & Stronger Valve Springs.
Solex Twin-Choke Down-draught Carburettor
Cold air ‘Resonator’ Intake
Centrifugal Type Air Cleaner
‘Full Power Free Flow’ Induction Manifold
High-efficiency Exhaust Manifold
Straight-Through Exhaust System
Engine develops 97.5 b.h.p. at 4500 r.p.m.
Compression Ratio 8.0:1 with 142 lb. ft. of Torque.

Ignition

High capacity sports coil and distributor. Automatic advance and retard with hand override control. 14 mm. wide gap, Champion plugs for improved ignition.

Cooling System

Pump and fan, belt driven. Special selective system provides maximum cooling for the hottest parts of the engine, thus maintaining even running temperatures. Automatic thermostatic control. A four-row radiator block is fitted.

Clutch

Borg and Beck single dry plate. Chain linkage to pedal.

Gearbox

Proved four-speed gearbox with control ring synchromesh on Top, 3rd and 2nd gears and finger-tip lever on steering column. Combined dip-stick and filter.

Overall Direct ratios: Top 4.22:1. Third 5.19:1. Second 8.54:1. First 11.04:1. Reverse 13.96:1.

Safety catch for reverse gear prevents accidental engagement.

Overdrive

The Laycock-de Normanville overdrive has a ratio is 0.778:1. It is designed for use in top gear.

Overall Overdrive ratios: Top 3.28:1. Third 5.61:1. Second 9.24:1. First 11.94:1. Reverse 11.51.96:1.

Rear Axle

Semi-floating design with Hypoid gear final drive. Ratio 4.22:1.

Frame

Complete box-section design of side members giving immense strength and rigidity. Box Section crossmember and ‘I’ section cruciform resist torsional deflection.

Suspension

Independent coil spring suspension at the front and semi-elliptic springs encased in plastic grease sleeves at the rear. The Suspension is controlled by the latest Armstrong hydraulic piston ‘R’ type shock absorbers, To eliminate roll and sway a transverse stabiliser is fitted to the rear and a torsion bar is fitted to the front.

Wheels

Five ‘easi-clean’, disc wheels fitted Rootes Group ‘rimfinishers’. Spare wheel and tyre housed in separate compartment under luggage boot. All wheels are specially balanced.

Tyres

Dunlop ‘Road-Speed’ Tyres (5·50×16 in.)

Brakes

Latest Lockheed two leading shoe system with hydraulic operation. 10-in. (254 mm.) diameter finned brake drums. Handbrake operates mechanically on rear wheels.

Special ‘Fade-Proof’ 2¼ in. wide linings giving total area of 172 sq. in. ensure high braking efficiency.

Steering

Burman high efficiency variable ration type with 3 spoke steering wheel, raked to give perfect control and comfort.

Petrol Tank

10 gallons capacity tank at rear of chassis.

Electrical System

12 volt, 51 amp. hours, Lucas battery housed under bonnet. Powerful starter operated by Solenoid button control on facia. Lucas ventilated dynamo with automatically regulated output. Two powerful flush-fitting sealed reflector headlamps with foot operated dipper control. Separate side lamps. Built-in twin tail lamps incorporating twin stop lamps operated by brake pedal pressure. Independent illumination for rear number plate. Instrument panel has concealed lighting. Dual wind tone horns. Lucas twin-blade windscreen wipers with single master control.

Bumpers

Full-width chromium wrap-around bumpers with overriders are fitted at the front and rear

Four Corner Jacking System

Mechanical jack fitting into permanent sockets on chassis frame.

Tool Kit

Neat compact case of smaller tools, spanners, etc., contained in special locker in front compartment. Larger tools, including large tyre pump and jack, are housed in felt-lined receptacle in rear locker lid.

Chassis Dimensions (approx.)
Wheelbase…   …   …   …97½ in.2476 mm.
Front track…   …   …   …47½ in.1206 mm.
Rear track…   …   …   …50½ in.1283 mm.
Ground clearance…   …   …   …6⅝ ins.168 mm.
Turning circle…   …   …   …36 ft.11 m.
Overall length …   …   …   …
168 in.  4267 m.
Overall width…   …   …   …62½ in.1587 mm.
Weights, approx. (Sports Saloon and Sports Convertible Coupe)
Unladen (with petrol and water)…   …   …   …2900 lbs.
2 passengers and 150 lbs of luggage …   …   …   …3350 lbs.
Colour Schemes

Alpine Mist with special Bright Red upholstery
Ivory with special Bright Read upholstery
Coronation Red with extra Light Fawn upholstery
Sapphire Blue with extra Light Fawn upholstery

Note: All wheels finished in body colour except for Ivory which had Bright Red

Optional Accessories

Heater and Ventilating Equipment. Radio. Cockpit Cover. Badge Bar. Cigarette Lighter. Exterior Door Mirror. Screen Washing Equipment. Racing Windscreens. Loose Seat Covers.


Sunbeam Alpine MKIII 1954–55

In October 1954, at the Olympia Motor show, the Sunbeam Alpine MKIII was launched. The Alpine MKIII is a two door 2-seater sports car with detachable side screens and a fully retractable hood which stowed out of sight behind the seats. The MKIII Alpine featured the same redesigned cylinder head with four exhaust ports as the MKIII Saloon and Coupe. All MKIII’s had the new style front bumper with the number plate fixed to a bracket below it and a new dashboard with integral revolution counter provision. A Laycock de Normanville overdrive was available as an option. Production ceased in July 1955, after 300 had been built.

Body Type

Sports.

Engine

Four-cylinder monobloc, overhead valves, high-duty light alloy connecting rods, special design detachable head and rocker cover. Steel-backed main and connecting rod bearings. Special type air silencer and cleaner. Mechanical petrol pump. A.C. detachable by-pass oil filter with renewable element. Floating filter oil pump intake. Three-bearing crankshaft, full-pressure lubrication. Three-bearing camshaft with harmonic cams. Down-draught carburettor with manual choke control. Thermostatically operated manifold system for rapid warm-up and easy starting. Cushioned power engine mountings absorb any vibration.

Bore and stroke: 81×110 mm. (3.1875 × 4·33 in.).

Cubic capacity: 2267 c.c. (138.2 cu. in.). Engine develops 80 b.h.p. at 4400 r.p.m with 7.50:1 compression head.

Ignition

Coil and distributor. Automatic advance and retard with hand override control. 14 mm. wide gap, Champion plugs for improved ignition.

Cooling System

Pump and fan, belt driven. Special selective system provides maximum cooling for the hottest parts of the engine, thus maintaining even running temperatures. Automatic thermostatic control. A four-row radiator block is fitted.

Clutch

Borg and Beck single dry plate. Chain linkage to pedal.

Gearbox

Proved four-speed gearbox with control ring synchromesh on Top, 3rd and 2nd gears and finger-tip lever on steering column. Combined dip-stick and filter.

Overall drive ratios: Top 3.90:1. Third 5.19:1. Second 8:54:1. First 11.04:1. Reverse 13.96:1.

Safety catch for reverse gear prevents accidental engagement.

Overdrive Unit (available at extra cost)

Full provision is made for the fitting of a Laycock-de Normanville overdrive unit. It is designed for use in top gear and is operated in conjunction with a final drive ratio of 4.22:1.

Overall Overdrive ratios: Top 3.28:1. Third 5.61:1. Second 9.24:1. First 11.94:1. Reverse 11.51.96:1.

Rear Axle

Semi-floating design with Hypoid gear final drive. Ratio 3.90:1.

Frame

Complete box-section design of side members giving immense strength and rigidity. Box Section crossmember and ‘I’ section cruciform resist torsional deflection.

Suspension

Independent coil spring suspension at the front and semi-elliptic springs encased in plastic grease sleeves at the rear. The Suspension is controlled by Armstrong hydraulic piston type shock absorbers, To eliminate roll and sway a transverse stabiliser is fitted to the rear and a torsion bar is fitted to the front.

Wheels

Five wheels fitted with styled nave plates, ‘slotted’ wheel discs and Rootes Group ‘rimfinishers’. All wheels are statically and dynamically balanced. Spare wheel and tyre housed in separate compartment under luggage boot.

Tyres

Dunlop extra low pressure, of large section. 5·50×16 in.

Brakes

Latest Lockheed two leading shoe system with hydraulic operation. Cast-iron 10-in. (254 mm.) diameter brake drums with extra wide brake linings 2¼ in. (57mm.): cast iron cooling fins. Handbrake operates mechanically on rear wheels.

Steering

Burman high efficiency variable ration type with 3 spoke steering wheel, raked to give perfect control and comfort. Right or left-hand steering is available according to market requirements.

Petrol Tank

10 gallons (45 litres) capacity tank at rear of chassis.

Electrical System

12 volt, 51 amp. hours, Lucas battery housed under bonnet. Powerful starter operated by Solenoid button control on facia. Lucas ventilated dynamo with automatically regulated output. Two powerful flush-fitting sealed reflector headlamps with foot operated dipper control. Separate side lamps. Built-in twin tail lamps incorporating twin stop lamps operated by brake pedal pressure and twin reversing lamps operated by gear change lever. Independent illumination for rear number plate. Control panel has concealed lighting. Self-cancelling flashing indicators controlled by switch on steering wheel. Dual wind tone horns. Lucas two-speed windscreen wipers with automatic park mechanism. Roof light.

Four Corner Jacking System

Mechanical jack fitting into permanent sockets on chassis frame.

Tool Kit

Neat compact case of smaller tools, spanners, etc., contained in special locker in front compartment. Larger tools, including large tyre pump and jack, are housed in felt-lined receptacle in rear locker lid.

Accessories (available at extra cost)

His Masters Voice Radio, Heater and Ventilating Equipment. White-wall tyres, Bumper overriders, Revolution counter, chromium plated fishtail exhaust, and manually operated override for automatic ignition. For details of the full range of Rootes Group Special Accessories apply to your dealer.

Chassis Dimensions (approx.)
Wheelbase…   …   …   …97½ in.2476 mm.
Front track…   …   …   …47½ in.1206 mm.
Rear track…   …   …   …50½ in.1283 mm.
Ground clearance…   …   …   …6⅝ ins.168 mm.
Turning circle…   …   …   …36 ft.11 m.
Overall length …   …   …   …
168 in.  4267 m.
Overall width…   …   …   …62½ in.1587 mm.
Weights, approx.
Unladen (with petrol and water)…   …   …   …3038 lbs.1378 kgs.
Laden (four passengers)…   …   …   …3626 lbs.1646 kgs.
Dry (without petrol or water)…   …   …   …2938 lbs.1333 kgs.
Colour Schemes

Alpine Mist with special Bright Red upholstery
Ivory with special Bright Read upholstery
Coronation Red with extra Light Fawn upholstery
Sapphire Blue with extra Light Fawn upholstery

Note: All wheels finished in body colour except for Ivory which had Bright Red