The Plymouth Road Runner Coupé 426 Hemi is a coupé with 2 doors and a front mounted engine which delivers the power through the rear wheels.
The Plymouth Road Runner Coupé 426 Hemi belongs to the FR2 model family from Plymouth.
Powering the Plymouth Road Runner Coupé 426 Hemi is an overhead valve, 7 litre naturally aspirated 8 cylinder powerplant, with 2 valves per cylinder that produces power and torque figures of 425 bhp (431 PS/317 kW) at 5000 rpm and 651 N·m (480 lb·ft/66.4 kgm) at 4000 rpm respectively.
The engine delivers its power through to the wheels via a 4 speed manual gearbox.
Full specs
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| bodywork | |||
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| Body type | 4/5 seater fixed-head coupé | ||
| Number of doors | 2 | ||
| Designer | |||
| dimensions & weights | |||
| Wheelbase | 2946 mm | 116 inches | |
| Track/tread (front) | 1516 mm | 59.7 inches | |
| Track/tread (rear) | 1491 mm | 58.7 inches | |
| Length | 5182 mm | 204 inches | |
| Width | 1941 mm | 76.4 inches | |
| Height | 1346 mm | 53 inches | |
| Ground clearance | 137 mm | 5.4 inches | |
| length:wheelbase ratio | 1.76 | ||
| Kerb weight | |||
| Weight distribution | |||
| fuel tank capacity | 72 litres | 15.8 [19] UK [US] gal. | |
| aerodynamics | |||
| Drag coefficient | |||
| Frontal area | |||
| CdA | |||
| Powertrain | |||
| engine type | naturally aspirated petrol | ||
| Engine manufacturer | Chrysler | ||
| Engine code | |||
| Cylinders | V 8 in 90° vee | ||
| Capacity | 7 litre 6974 cc (425.58 cu in) |
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| Bore × Stroke | 107.95 × 95.25 mm
4.25 × 3.75 in |
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| Bore/stroke ratio | 1.13 | ||
| Valve gear | overhead valve (OHV)
2 valves per cylinder 16 valves in total |
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| maximum power output (gross) |
431 PS (425 bhp) (317 kW) at 5000 rpm |
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| maximum torque (gross) |
651 Nm (480 ft·lb) (66.4 kgm) at 4000 rpm |
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| Specific output (gross) |
45.4 kW/litre 61.8 ps/litre 60.9 bhp/litre 1 bhp/cu in |
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| Specific torque (gross) |
93.35 Nm/litre
1.13 ft·lb/cu3 |
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| Engine construction | cast iron block & head | ||
| Lubrication | wet sumped | ||
| compression ratio | 10.2:1 | ||
| Fuel system | |||
| bmep (brake mean effective pressure) | 1173 kPa (170.1 psi) | ||
| Maximum RPM | |||
| crankshaft bearings | 5 | ||
| Engine coolant | Water | ||
| Unitary capacity | 871.75 cc | ||
| Aspiration | Normal | ||
| Compressor | N/A | ||
| Intercooler | None | ||
| Catalytic converter | N | ||
| performance | |||
| Acceleration 0-80km/h (50mph) | |||
| Acceleration 0-60mph | |||
| Acceleration 0-100km/h | |||
| Acceleration 0-160km/h (100mph) | |||
| Standing quarter-mile | |||
| Standing kilometre | |||
| Maximum speed | |||
| Power-to-weight ratio | |||
| Weight-to-power ratio | |||
| fuel consumption | |||
| Fuel consumption | |||
| universal fuel consumption (calculated from the above) | |||
| litres/100km | |||
| km/litre | |||
| UK MPG | |||
| US MPG | |||
| 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 | 5.300 | ||
| Turning circle | |||
| Front suspension | |||
| Rear suspension | |||
| Wheel size front | 6.0JJ x 14 | ||
| Wheel size rear | 6.0JJ x 14 | ||
| Tyres front | F70 x 14 | ||
| Tyres rear | F70 x 14 | ||
| Brakes F/R | Dr/Dr | ||
| Front brake diameter | 279 mm | ||
| Rear brake diameter | 254 mm | ||
| Braked area | |||
| Gearbox | 4 speed manual | ||
| Top gear ratio | 1 | ||
| Final drive ratio | 3.54 | ||
| general | |||
| Carfolio.com ID | 522412 | ||
| Production total | |||
| Model code | RM21 | ||
| Model family | FR2 | ||
| RAC rating | 57.8 | ||
| Insurance classification | No information available | ||
| Tax band | No information available | ||
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1970 Plymouth Road Runner Coupé 426 Hemi added 2017-06-21. Last modified 2020-03-16. |
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