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Lotus Seven S4

Bodywork

type 2S RDSR
doors 2

Engine information

Bore × stroke 81.00 mm × 63.00 mm 3.19 in × 2.48 in
Cylinders S-4
Displace 1.3 litre 1298 cc (79.209 cu in)
Engine type OHV
Valves 2 valves per cylinder | 8 valves in total
Engine construction cast iron block & head
Sump Wet sumped
Compression ratio 9.00:1
Fuel system 1 We carb
Maximum power
0-50 mph
0-60 mph
0-100 mph
0-100 km/h
80 - 120 km/h
402 m (Quarter mile)
Standing km
Top speed 160 km/h (99 mph)
Fuel consumption
CO2 emissions
Power to weight ratio 117.85 bhp/ton
Specific output
Maximum torque
bmep 890.7 kPa (129.2 psi)
Specific torque 70.88 Nm/litre
Maximum rpm 6000 rpm
Code
Main bearings 5
Coolant Water
Bore / stroke ratio 1.29
Unitary capacity 324.5 cc/cylinder
Aspiration Normal
Compressor type N/A
Intercooler None
Catalytic converter N

Dimensions and weight

wheelbase 2286 mm
wheelbase 90 in
Length (milimeters) 3716 mm
Length (inches) 146.3 in
Width (milimeters) 1537 mm
Width (inches) 60.5 in
Height (milimeters) 1086 mm
Height (inches) 42.8 in
L:W ratio 1.63
Ground clearance (milimeters) 165 mm
Ground clearance (inches) 6.5 in
Kerb weight (kilograms) 594 kg
Kerb weight (pounds) 1310 lb
Weight distribuiton
Fuel capacity (litres) 34 litres
Fuel capacity (UK Ga) 7.5 UK Gal
Fuel capacity (US Gal) 9 US Gal

Aerodynamics

Drag coefficient
Frontal area
Cx

Chassis

Engine location Front
Engine alignment Longitudinal
Drive RWD
Steering rack & pinion
Turns lock-to-lock 2.800
Turning circle
Tyres 165 x 13
Wheels 5.5
Brakes F/R Di/Dr
Brake ∅ 216 mm
Braked area
Transmission 4M
Top gear ratio 1.00
Final drive ratio 3.77

General information

RAC rating 16.3
Number made
Model code
Model family
Insurance classification No information available
Tax band No information available

Manual Download

Download 1971 Lotus Seven S4 PDF Manual
Designer unknown
Year 1971

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