The 420 SL is an automobile from Mercedes-Benz, with rear wheel drive, a front positioned engine and a Friedrich Geiger-designed 2 door convertible/cabriolet body style.
It is part of Mercedes-Benz's R 107 model series.
The 8 cylinder, single overhead camshaft naturally aspirated engine has 2 valves per cylinder and a volume of 4.2 litres. It musters power and torque figures of 201 bhp (204 PS/150 kW) at 5200 rpm and 304 Nm (224 lbft/31 kgm) at 3600 rpm respectively.
The engine delivers its power through to the wheels via a 4 speed automatic gearbox.
Stated kerb weight is 1600 kg.
The Mercedes-Benz 420 SL is claimed to achieve a top speed of 205 km/h, or 127 mph, stated fuel consumption is 9.9/12.1/15.4 l/100km 90 km/h / 120 km/h / urban per 80/1268/EEC.
Full specs
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| bodywork | |||
|---|---|---|---|
| Body type | 2 seater convertible/cabriolet | ||
| Number of doors | 2 | ||
| Designer | Friedrich Geiger | ||
| dimensions & weights | |||
| Wheelbase | 2455 mm | 96.7 inches | |
| Track/tread (front) | 1460 mm | 57.5 inches | |
| Track/tread (rear) | 1465 mm | 57.7 inches | |
| Length | 4390 mm | 172.8 inches | |
| Width | 1791 mm | 70.5 inches | |
| Height | 1295 mm | 51 inches | |
| Ground clearance | |||
| length:wheelbase ratio | 1.79 | ||
| Kerb weight | 1600 kg | 3527 lb | |
| Weight distribution | |||
| fuel tank capacity | 85 litres | 18.7 [22.5] UK [US] gal. | |
| aerodynamics | |||
| Drag coefficient | |||
| Frontal area | |||
| CdA | |||
| Powertrain | |||
| engine type | naturally aspirated petrol | ||
| Engine manufacturer | Mercedes-Benz | ||
| Engine code | M 116 E 42 / 116.964 | ||
| Cylinders | V 8 | ||
| Capacity | 4.2 litre 4196 cc (256.056 cu in) |
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| Bore × Stroke | 92 × 78.9 mm
3.62 × 3.11 in |
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| Bore/stroke ratio | 1.17 | ||
| Valve gear | single overhead camshaft (SOHC)
2 valves per cylinder 16 valves in total |
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| maximum power output (DIN) |
204 PS (201 bhp) (150 kW) at 5200 rpm |
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| maximum torque (DIN) |
304 Nm (224 ft·lb) (31 kgm) at 3600 rpm |
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| Specific output (DIN) |
35.7 kW/litre 48.6 ps/litre 47.9 bhp/litre 0.78 bhp/cu in |
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| Specific torque (DIN) |
72.45 Nm/litre
0.88 ft·lb/cu3 |
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| Engine construction | |||
| Lubrication | wet sumped | ||
| compression ratio | 9:1 | ||
| Fuel system | Bosch KE-Jetronic fuel injection | ||
| bmep (brake mean effective pressure) | 910.4 kPa (132 psi) | ||
| Maximum RPM | |||
| crankshaft bearings | 5 | ||
| Engine coolant | Water | ||
| Unitary capacity | 524.5 cc | ||
| Aspiration | Normal | ||
| Compressor | N/A | ||
| Intercooler | None | ||
| Catalytic converter | Y | ||
| performance | |||
| Acceleration 0-80km/h (50mph) | |||
| Acceleration 0-60mph | |||
| Acceleration 0-100km/h | 9 s | ||
| Acceleration 0-160km/h (100mph) | |||
| Standing quarter-mile | |||
| Standing kilometre | |||
| Maximum speed | 205 km/h (127 mph) | ||
| Power-to-weight ratio | Higher is better 127.37 PS/tonne (1000 kg) 0.13 PS/kg 93.68 kW/tonne (1000 kg) 0.09 kW/kg 125.63 bhp/tonne (1000 kg) 0.13 bhp/kg 0.06 bhp/lb |
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| Weight-to-power ratio | Lower is better 10.67 kg/kW 17.83 lb/bhp |
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| fuel consumption | |||
| Fuel consumption | 9.9/12.1/15.4 l/100km 90 km/h / 120 km/h / urban per 80/1268/EEC | ||
| universal fuel consumption (calculated from the above) | |||
| litres/100km | 9.9/12.1/15.4 l/100km 90kmph/120kmph/urban | ||
| km/litre | 10.1/8.3/6.5 km/l 90kmph/120kmph/urban | ||
| UK MPG | 28.5/23.3/18.3 UK MPG 90kmph/120kmph/urban | ||
| US MPG | 23.8/19.4/15.3 US MPG 90kmph/120kmph/urban | ||
| Carbon dioxide emissions | |||
| Carfolio Calculated CO2 ? | |||
| VED band (UK) | |||
| CO2 Effizienz (DE) | |||
| chassis | |||
| Engine position | front | ||
| Engine layout | longitudinal | ||
| Drive wheels | rear wheel drive | ||
| Torque split | N/A | ||
| Steering | |||
| turns lock-to-lock | |||
| Turning circle | |||
| Front suspension | |||
| Rear suspension | |||
| Wheel size front | 7½J x 15 | ||
| Wheel size rear | 7½J x 15 | ||
| Tyres front | 205/65 VR 15 | ||
| Tyres rear | 205/65 VR 15 | ||
| Brakes F/R | VeDi/VeDi-S-ABS | ||
| Front brake diameter | 286 mm | ||
| Rear brake diameter | 279 mm | ||
| Braked area | |||
| Gearbox | 4 speed automatic | ||
| Top gear ratio | 1 | ||
| Final drive ratio | 2.47 | ||
| general | |||
| Carfolio.com ID | 730125 | ||
| Production total | |||
| Model code | R 107 E 42 | ||
| Model family | R 107 | ||
| RAC rating | 42.0 | ||
| Insurance classification | No information available | ||
| Tax band | No information available | ||
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1985 Mercedes-Benz 420 SL added 2021-10-23. Last modified 2021-10-23. |
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