| petrol | |
| diesel | |
| alcohol based | |
| gas (LPG, CNG) | |
| steam | |
| electricity |
(1971 model)
2-door 2-seater roadster, petrol (gasoline) 4-cylinder 8-valve straight (inline) engine, OHV (overhead valve, I-head), 1298 cm3 / 79.2 cu in / 79.2 cu in, 52.2 kW / 70.0 hp / 70.0 hp @ 5700 rpm / 5700 rpm / 5700 rpm, 92.0 N·m / 67.9 lb·ft / 67.9 lb·ft, manual 4-speed transmission, rear wheel drive, 160 km/h / 99 mph / 99 mph top speed
| Marque (make) | Lotus | Issued from | 1971 |
|---|---|---|---|
| Model | Seven S4 | Issued until | |
| Serie | Seven | Number made | |
| Model family | Body construction | ||
| Model code | Body designation | ||
| Manufacturer | Lotus | Country | UK |
| Base platform | Number of doors | 2 | |
|---|---|---|---|
| Bodywork type | roadster | Number of seats | 2 |
| Bodywork designer | Cargo capacity (volume) | ||
| Passenger space (volume) | 3430 l / 121.13 cu ft / 121.13 cu ft | Max. cargo capacity (volume) |
| Length | 3716 mm / 146.3 in / 146.3 in | Total (curb) weight | 594 kg / 1310 lb / 1310 lb |
|---|---|---|---|
| Width | 1537 mm / 60.5 in / 60.5 in | Dry weight | |
| Height | 1086 mm / 42.8 in / 42.8 in | Load capacity | |
| Wheelbase | 2286 mm / 90.0 in / 90.0 in | Gross (max.) weight | |
| Track front | 1239 mm / 48.8 in / 48.8 in | Towing weight | |
| Track rear | 1308 mm / 51.5 in / 51.5 in | Weight distribution (front) | |
| Ground clearance | 165 mm / 6.5 in / 6.5 in | Fuel capacity | 34 l / 7.5 UK gal / 9.0 US gal |
| Length/wheelbase ratio | 1.63 |
| Drag coefficient (Cd, Cx, Cw) | Frontal area (A) | 1.42 m2 / 15.3 sq ft / 15.3 sq ft (est.) | |
|---|---|---|---|
| Aerodynamic coefficient (Cd×A) | Aerodynamic resistance (Aero horse power) at 100 km/h (62 mph) |
| Engine Code | Total number of cylinders | 4 | |
|---|---|---|---|
| Engine Type | straight (inline) (Inline, 4 cylinder) | Total number of valves | 8 |
| Engine Manufacturer | Valves per cylinder | 2 | |
| Engine construction | cast iron block & head | Bore | 81.0 mm / 3.19 in / 3.19 in |
| Fuel | petrol (gasoline) | Stroke | 63.0 mm / 2.48 in / 2.48 in |
| Fuel details | Bore/Stroke ratio | 1.29 | |
| Fuel supply | 1 We carb | Engine displacement | 1298 cm3 / 79.2 cu in / 79.2 cu in |
| Engine Main bearings | 5 | Unitary capacity | 324.50 cm3/cylinder / 19.802 cu in/cylinder / 19.802 cu in/cylinder |
| Cam Design | OHV (overhead valve, I-head) | Compression ratio | 9.0 : 1 |
| Sump | wet | Max. output power | 52.2 kW / 70.0 hp / 70.0 hp at 5700 rpm / 5700 rpm / 5700 rpm |
| Aspiration | natural | Max. torque | 92.0 N·m / 67.9 lb·ft / 67.9 lb·ft at |
| Compressor type | N/A | Maximum rpm | 6000 rpm / 6000 rpm / 6000 rpm |
| Intercooler | no | Max. net output (power at the wheels) | 20.9 kW / 28.0 hp / 28.0 hp (est.) |
| Coolant | water | Specific output | 40.2 kW/l / 0.884 bhp/cu in / 0.884 bhp/cu in |
| Catalytic converter | no | Specific torque | 70.9 N·m/l / 0.62 lb·ft/cu in / 0.62 lb·ft/cu in |
| Transmission type | manual | Number of gears | 4 |
|---|---|---|---|
| Wheel drive | rear wheel drive | Top gear (drive) ratio | 1 |
| Final gear (drive) ratio | 3.77 |
| Acceleration 0-50 mph (80 km/h) | Top (maximal) speed | 160 km/h / 99 mph / 99 mph | |
|---|---|---|---|
| Acceleration 0-60 mph (97 km/h) | Power-to-weight ratio | 117.8 kW/ton / 89.3 bhp/ton / 89.3 bhp/ton | |
| Acceleration 0-100 km/h | Fuel consumption, City (urban) | ||
| Acceleration 0-100 mph (160 km/h) | Fuel consumption, Road (extra-urban) | ||
| Acceleration 80-120 km/h (50-70 mph) in top | Fuel consumption, Mixed (combined) | ||
| Standing ¼mile time | Fuel consumption, Euro | ||
| Standing kilometer time | CO2 emissions | ||
| Range |
| Engine location | front | Engine alignment | longitudinal |
|---|---|---|---|
| Steering | rack & pinion | Steering details | |
| Turns lock-to-lock | 2.8 | Turning circle | 9.0 m / 29.5 ft / 29.5 ft |
| Suspension front | Independent, Wishbone (A-arm, control arm), Coil springs, Anti-roll (anti-sway) bar (ARB) | Suspension rear | Live axle, Watt's linkage, Coil springs |
| Wheels front | 5.5 | Wheels rear | 5.5 |
| Tyres front | 165 x 13 | Tyres rear | 165 x 13 |
| Brakes front | disc | Brakes rear | drum |
| Brake diameter front | 216 mm / 8.5 in / 8.5 in | Brake diameter rear | 216 mm / 8.5 in / 8.5 in |
| Brakes details | Braked area |
Technical specifications and performance data of Lotus Seven S4
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