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Seven Versions

Lotus Seven S4 Specs

(1971 - ) Technical Specifications

Petrol

79.2 cu-in
1298 cm³

Inline 4

70 HP
71 PS / 52 kW

67 lb-ft
92.0 Nm

99 Mph
160 km/h

Lotus Seven S4 Body, Model and Production details

Body :	Roadster

Num. of Doors :	2 doors


Lotus Seven S4 Engine Technical Data

Engine type - Number of cylinders :	Inline 4

Engine Code :	-

Fuel type :	Petrol

Fuel System :	1 Weber carb

Engine Alignment :	Longitudinal

Engine displacement :	79.2 cu-in / 1298 cm³

Bore x Stroke :	3.19 x 2.48 inches 81.00 x 63.00 mm

Number of valves :	8 Valves

Aspiration :	naturally-aspirated

Compression Ratio :	9.00

Horsepower :	70 HP / 71 PS / 52 kW @ 5700 rpm

Maximum torque :	67 lb-ft / 92.0 Nm @ 5700 rpm

Drive wheels - Traction - Drivetrain :	RWD

Transmission Gearbox - Number of speeds :	4 speed Manual Transmission Relations Final Drive Ratio: 3.77


Lotus Seven S4 Fuel Consumption (Economy), Emissions and Range

Fuel Tank Capacity :	9 gallons 34 L 7.5 UK gallons

Catalytic converter :	No


Lotus Seven S4 Size, Dimensions, Aerodynamics and Weight

Wheelbase :	90 inches / 228.6 cm

Length :	146.3 inches / 371.6 cm

Width :	60.51 inches / 153.7 cm

Height :	42.76 inches / 108.6 cm

Front Axle :	48.78 inches / 123.9 cm

Rear Axle :	51.5 inches / 130.8 cm

Ground clearance :	6.5 inches / 16.5 cm

Aerodynamic drag coefficient - Cx :	-

Curb Weight :	1310 lbs / 594 kg

Weight/Power Output Ratio :	8.4 kg/hp


Lotus Seven S4 Brakes, Tires, Steering and Suspension

Front Brakes - Disc dimensions :	Discs (8.5 inches / 216 mm)

Rear Brakes - Disc dimensions :	Drums (8.5 inches / 216 mm)

Front Tyres - Rims dimensions :	-/- R-

Rear Tyres - Rims dimensions :	-/- R-

Steering :	Rack and pinion. -

Steering wheel lock-to-lock :	2.800 turns

Front Suspension :	Coil springs. Anti-roll bar.

Rear Suspension :	Coil springs. Watts linkage. De Dion axle.