Comparison BMW 4 Series Convertible (F33) 420d (184 Hp) Steptronic & Vauxhall Signum 2.2i 16V Direct ECOTEC (155 Hp) Automatic & BMW 4 Series Coupe (F32, facelift 2017) 420d (190 Hp) Steptronic
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| Brand: | BMW | Vauxhall | BMW |
| Model: | 4 Series | Signum | 4 Series |
| Generation: | 4 Series Convertible (F33) | Signum | 4 Series Coupe (F32, facelift 2017) |
| Engine / modification: | 420d (184 Hp) Steptronic | 2.2i 16V Direct ECOTEC (155 Hp) Automatic | 420d (190 Hp) Steptronic |
| Production start: | 2014 year | 2003 year | 2017 year |
| Production end: | 2015 year | 2008 year | 2020 year |
| Coupe type: | Cabriolet | Hatchback | Coupe |
| Num. of Doors: | 2 | 5 | 2 |
| Num. of seats: | 4 | 5 | 4 |
| Fuel consumption / economy - urban: | 5.7 l/100 km | 11.6 l/100 km | 4.7-5.1 l/100 km |
| Fuel consumption / economy - extra urban: | 4.3 l/100 km | 6.4 l/100 km | 3.6-3.9 l/100 km |
| Fuel consumption / economy - combined: | 4.8 l/100 km | 8.3 l/100 km | 4.0-4.3 l/100 km |
| Fuel Type: | Diesel | Petrol (Gasoline) | Diesel |
| Drag coefficient: | 0.28 | 0.28 | 0.28 |
| Fuel tank volume: | 57 l | 57 l | |
| Emission standard: | Euro 6 | Euro 4 | Euro 6 |
| CO2 emissions: | 127 g/km | 199 g/km | 106-114 g/km |
| Power: | 184 hp | 155 hp | 190 hp |
| Max power in: | 4000 rpm. | 5600 rpm. | 4000 rpm. |
| Maximum speed: | 228 km/h | 206 km/h | 232 km/h |
| Acceleration from 0 to 100 km/h: | 8.2 sec | 7.1 sec | |
| Torque: | 380 Nm @ 1750-2750 rpm. | 220 Nm @ 3800 rpm. | 400 Nm @ 1750-2500 rpm. |
| Model Engine: | N47D20 | B47D20 | |
| Engine position: | Front, longitudinal | Front, transverse | Front, longitudinal |
| Engine displacement: | 1995 cm3 | 2198 cm3 | 1995 cm3 |
| Engine oil capacity: | 5.2 l | 5.0 l | |
| Coolant: | 7.0 l | 7 l | |
| Fuel System: | Diesel Commonrail | Multi-point injection | Diesel Commonrail |
| Aspiration / Turbine: | Twin-power turbo | Twin-power turbo | |
| Position of cylinders: | Inline | Inline | Inline |
| Valvetrain: | DOHC | ||
| Number of cylinders: | 4 | 4 | 4 |
| Number of valves per cylinder: | 4 | 4 | 4 |
| Compression ratio: | 16.5 | 12 | 16.5 |
| Piston Stroke: | 90 mm | 94.6 mm | 90 mm |
| Cylinder Bore: | 84 mm | 86 mm | 84 mm |
| Wheel Drive: | Rear wheel drive | Front wheel drive | Rear wheel drive |
| Number of Gears (automatic transmission): | 8 Steptronic | 5 | 8 Steptronic |
| Length: | 4638 mm | 4651 mm | 4640 mm |
| Width: | 1825 mm | 1798 mm | 1825 mm |
| Width including mirrors: | 2036 mm | ||
| Height: | 1384 mm | 1466 mm | 1377 mm |
| Wheelbase: | 2810 mm | 2830 mm | 2810 mm |
| Front track: | 1545 mm | 1547 mm | |
| Rear (Back) track: | 1594 mm | 1593 mm | |
| Ride height(clearance): | 130 mm | 130 mm | |
| Minimum volume of Luggage (trunk): | 220 l | 365 l | 445 l |
| Maximum amount of Luggage (trunk): | 370 l | 1410 l | |
| Front suspension: | Independent, spring | Independent, Spring McPherson, with stabilizer | Independent, spring |
| Rear suspension: | Multi-link independent | Multi-link independent | Multi-link independent |
| Max weight: | 2160 kg | 2020 kg | |
| Front brakes: | Ventilated discs | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Disc | Ventilated discs |
| Kerb Weight: | 1690 kg | 1415 kg | 1500 kg |
| ABS: | yes | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion | |
| Power steering: | Electric Steering | Electric Steering | |
| Max. roof load: | 75 kg | ||
| Minimum turning circle (turning diameter): | 11.3 m | 11.3 m | |
| Permitted trailer load with brakes (12%): | 1600 kg | 1600 kg | |
| Permitted trailer load without brakes: | 750 kg | 745 kg | |
| Permitted towbar download: | 75 kg | 75 kg | |
| Tire size: | 225/50 R17 94W | 225/50 R17; 225/45 R18; 255/40 R18; 225/40 R19; 255/35 R19 | |
| Wheel rims size: | 7.5J x 17 | 7.5J x 17; 8J x 18; 8.5J x 18; 8J x 19; 8.5J x 19 |