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| General Information |
| Make |
Lotus |
| Model |
Seven S4 |
| Production Year |
1971 |
| Country |
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| Designer |
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| Production Number |
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| Model Code |
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| Model Family |
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| Chassis and Dimensions |
| Chassis Type |
2S RDSR |
| Number of Doors |
2 |
| Wheelbase |
2286 mm (90 in) |
| Front Track |
1239 mm (48,8 in) |
| Rear Track |
1308 mm (51,5 in) |
| Length |
3716 mm (146,3 in) |
| Width |
1537 mm (60,5 in) |
| Height |
1086 mm (42,8 in) |
| Ground Clearance |
165 mm (6,5 in) |
| Length / Wheelbase Ratio |
1,63 |
| Weight |
594 kg (1308,4 lb) |
| Weight Distribution (front/rear) |
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| Fuel Capacity |
34 litre (7,5 Imp gal , 9 US gal) |
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| Aerodynamics |
| Drag Coefficient |
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| Frontal Area |
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| Cx |
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| Engine Specifications |
| Engine Manufacturer |
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| Engine Location |
Front |
| Engine Alignment |
Longitudinal |
| Engine Construction |
cast iron block & head |
| Coolant Type |
Water |
| Engine Type |
OHV |
| Number of Cylinders and Placement |
S-4 |
| Valves per Cylinder |
2 (Total of 8 Pieces) |
| Engine Displacement |
1298 cc (79,21 cu in) |
| Bore |
81 mm (3,19 in) |
| Stroke |
63 mm (2,48 in) |
| Bore / Stroke Ratio |
1,29 |
| Unitary Capacity |
324,5 cc/cylinder (19,8 cu in/cylinder) |
| Number of Main Bearings |
5 |
| Compression Ratio |
9 : 1 |
| Fuel System Type |
1 We carb |
| Aspiration Type |
Normal |
| Compressor Type |
- |
| Intercooler Type |
None |
| Catalytic Converter |
No |
| Maximum Engine Power |
70 HP (52,2 kW) |
| Maximum Engine Power rpm |
5700 d/d |
| Maximum Engine Torque |
92 N.m (67,9 lb.ft , 9,4 kg.m) |
| Maximum Engine Torque rpm |
0 d/d |
| Engine Torque at Max. Engine Power rpm |
87,4 N.m (5700 d/d) |
| Power / Weight Ratio |
117,8 HP/ton (87,9 W/kg) |
| Power / Engine Displacement Ratio |
53,9 HP/litre (40,2 kW/litre) |
| CO2 Emissions |
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| Fuel Consumption |
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| Performance |
| 0 - 80 km/h |
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| 0 - 60 mph |
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| 0 - 100 km/h |
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| 0 - 160 km/h |
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| 80 - 120 km/h (in top gear) |
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| 0 - 400 m Acceleration |
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| 0 - 1000 m Acceleration |
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| Top Speed |
160 km/h (99,4 mph) |
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| Gearbox and Transmission |
| Transmission Type |
4M |
| Top Gear Ratio |
1 : 1 |
| Final Drive Ratio |
3,77 : 1 |
| Drive Wheels |
RWD (Rear Wheel Drive) |
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| Handling, Suspension Geometry and Brakes |
| Steering Type |
rack & pinion |
| Steering Turns (lock to lock) |
2,8 |
| Turning Circle Diameter |
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| Suspension (front) |
I.W.CS.ARB. |
| Suspension (rear) |
LA.WL.CS. |
| Brakes (front/rear) |
Di/Dr |
| Brake Disc Diameter (front) |
216 mm |
| Brake Disc Diameter (rear) |
216 mm |
| Wheels (front) |
5.5 |
| Wheels (rear) |
5.5 |
| Tyres (front) |
165 x 13 |
| Tyres (rear) |
165 x 13 |
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