The ZR 120 Stepspeed is a road car from MG, with front wheel drive, a front located engine and a 3 door hatchback body style.
Its 4 cylinder, double overhead camshaft naturally aspirated engine has 4 valves per cylinder and a displacement of 1.8 litres. It produces power and torque figures of 115 bhp (117 PS/86 kW) at 5500 rpm and 160 Nm (118 lbft/16.3 kgm) at 2750 rpm respectively.
A continuously variable 'box delivers the power to the wheels.
It weighs a stated 1160 kg at the kerb.
Its maximum speed claimed is 180 km/h or 112 mph, official fuel consumption figures are 11.5/6.3/8.2 l/100km urban/extra-urban/combined, and carbon dioxide emissions are 196.0 g/km.
Full specs
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| bodywork | |||
|---|---|---|---|
| Body type | 4/5 seater hatchback | ||
| Number of doors | 3 | ||
| Designer | |||
| dimensions & weights | |||
| Wheelbase | 2500 mm | 98.4 inches | |
| Track/tread (front) | 1472 mm | 58 inches | |
| Track/tread (rear) | 1457 mm | 57.4 inches | |
| Length | 4011 mm | 157.9 inches | |
| Width | 1688 mm | 66.5 inches | |
| Height | 1400 mm | 55.1 inches | |
| Ground clearance | |||
| length:wheelbase ratio | 1.6 | ||
| Kerb weight | 1160 kg | 2557 lb | |
| Weight distribution | |||
| fuel tank capacity | 50 litres | 11 [13.2] UK [US] gal. | |
| aerodynamics | |||
| Drag coefficient | 0.39 | ||
| Frontal area | 2.03 m² | ||
| CdA | 0.79 | ||
| Powertrain | |||
| engine type | naturally aspirated petrol | ||
| Engine manufacturer | Rover | ||
| Engine code | |||
| Cylinders | Straight 4 | ||
| Capacity | 1.8 litre 1796 cc (109.599 cu in) |
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| Bore × Stroke | 80 × 89.3 mm
3.15 × 3.52 in |
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| Bore/stroke ratio | 0.9 | ||
| Valve gear | double overhead camshaft (DOHC)
4 valves per cylinder 16 valves in total |
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| maximum power output | 117 PS (115 bhp) (86 kW) at 5500 rpm |
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| maximum torque | 160 Nm (118 ft·lb) (16.3 kgm) at 2750 rpm |
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| Specific output | 47.7 kW/litre 64.9 ps/litre 64 bhp/litre 1.05 bhp/cu in |
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| Specific torque |
89.09 Nm/litre
1.08 ft·lb/cu3 |
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| Engine construction | |||
| Lubrication | wet sumped | ||
| compression ratio | 10.5:1 | ||
| Fuel system | MEMS3 | ||
| bmep (brake mean effective pressure) | 1119.5 kPa (162.4 psi) | ||
| Maximum RPM | |||
| crankshaft bearings | 5 | ||
| Engine coolant | Water | ||
| Unitary capacity | 449 cc | ||
| Aspiration | Normal | ||
| Compressor | N/A | ||
| Intercooler | None | ||
| Catalytic converter | Y | ||
| performance | |||
| Acceleration 0-80km/h (50mph) | |||
| Acceleration 0-60mph | 9.5 s | ||
| Acceleration 0-100km/h | |||
| Acceleration 0-160km/h (100mph) | |||
| Standing quarter-mile | |||
| Standing kilometre | |||
| Maximum speed | 180 km/h (112 mph) | ||
| Power-to-weight ratio | Higher is better 100.52 PS/tonne (1000 kg) 0.1 PS/kg 73.93 kW/tonne (1000 kg) 0.07 kW/kg 99.14 bhp/tonne (1000 kg) 0.1 bhp/kg 0.04 bhp/lb |
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| Weight-to-power ratio | Lower is better 13.53 kg/kW 22.59 lb/bhp |
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| fuel consumption | |||
| Fuel consumption | 11.5/6.3/8.2 l/100km urban/extra-urban/combined | ||
| universal fuel consumption (calculated from the above) | |||
| litres/100km | 11.5/6.3/8.2 l/100km urban/extra-urban/combined | ||
| km/litre | 8.7/15.9/12.2 km/l urban/extra-urban/combined | ||
| UK MPG | 24.6/44.8/34.4 UK MPG urban/extra-urban/combined | ||
| US MPG | 20.5/37.3/28.7 US MPG urban/extra-urban/combined | ||
| Carbon dioxide emissions | 196.0 g/km NEDC | ||
| Carfolio Calculated CO2 ? | |||
| VED band (UK) | J | ||
| CO2 Effizienz (DE) | |||
| chassis | |||
| Engine position | front | ||
| Engine layout | transverse | ||
| Drive wheels | front wheel drive | ||
| Torque split | N/A | ||
| Steering | power assisted rack & pinion | ||
| turns lock-to-lock | |||
| Turning circle | 11.60 m | ||
| Front suspension | I.MS.CS.ARB. | ||
| Rear suspension | I.CS. | ||
| Wheel size front | 6½J x 16 | ||
| Wheel size rear | 6½J x 16 | ||
| Tyres front | 205/50 R 16 | ||
| Tyres rear | 205/50 R 16 | ||
| Brakes F/R | VeDi/Di-S | ||
| Front brake diameter | 262 mm | ||
| Rear brake diameter | 239 mm | ||
| Braked area | |||
| Gearbox | continuously variable transmission | ||
| Top gear ratio | 0.44 | ||
| Final drive ratio | 5.76 | ||
| general | |||
| Carfolio.com ID | 109626 | ||
| Production total | |||
| Model code | |||
| RAC rating | 15.9 | ||
| Insurance classification | No information available | ||
| Tax band | No information available | ||
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2001 MG ZR 120 Stepspeed added 2003-05-02. Last modified 2013-02-28. |
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