Comparison BMW Z4 (E89) 28i (245 Hp) sDrive Automatic & BMW 8 Series (E31) 830i 3.0 (218 Hp) & Vauxhall Vectra B CC 2.0i 16V (136 Hp)
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| Brand: | BMW | BMW | Vauxhall |
| Model: | Z4 | 8 Series | Vectra |
| Generation: | Z4 (E89) | 8 Series (E31) | Vectra B CC |
| Engine / modification: | 28i (245 Hp) sDrive Automatic | 830i 3.0 (218 Hp) | 2.0i 16V (136 Hp) |
| Production start: | 2011 year | 1992 year | 1995 year |
| Production end: | 2013 year | 1992 year | 2000 year |
| Coupe type: | Cabriolet | Coupe | Hatchback |
| Num. of Doors: | 2 | 2 | 5 |
| Num. of seats: | 2 | 4 | 5 |
| Fuel consumption / economy - urban: | 9.4 l/100 km | 12.2 l/100 km | |
| Fuel consumption / economy - extra urban: | 5.3 l/100 km | 6.5 l/100 km | |
| Fuel consumption / economy - combined: | 6.8 l/100 km | 8.6 l/100 km | |
| Fuel Type: | Petrol (Gasoline) | Diesel | Petrol (Gasoline) |
| Fuel tank volume: | 55 l | 90 l | 60 l |
| CO2 emissions: | 159 g/km | ||
| Power: | 245 hp | 218 hp | 136 hp |
| Max power in: | 5000-6500 rpm. | 4000 rpm. | 5600 rpm. |
| Maximum speed: | 250 km/h | 241 km/h | 215 km/h |
| Acceleration from 0 to 100 km/h: | 5.5 sec | 7.8 sec | 10 sec |
| Torque: | 350 Nm @ 1250-4800 rpm. | 500 Nm @ 2750 rpm. | 188 Nm/3200 rpm. |
| Model Engine: | N20B20 | M60B30 | |
| Engine position: | Front, longitudinal | Front, longitudinal | Front, transverse |
| Engine displacement: | 1997 cm3 | 2993 cm3 | 1998 cm3 |
| Engine oil capacity: | 4.75 l | ||
| Fuel System: | Direct injection | Diesel Commonrail | Multi-point injection |
| Aspiration / Turbine: | Twin-power turbo | Turbocharger | |
| Position of cylinders: | Inline | Inline | Inline |
| Valvetrain: | DOHC | DOHC | |
| Number of cylinders: | 4 | 6 | 4 |
| Number of valves per cylinder: | 4 | 4 | 4 |
| Compression ratio: | 18 | 10.8 | |
| Piston Stroke: | 90.1 mm | 90 mm | 86 mm |
| Cylinder Bore: | 84 mm | 84 mm | 86 mm |
| Wheel Drive: | Rear wheel drive | Rear wheel drive | |
| Number of Gears (automatic transmission): | 8 | - | |
| Number of Gears (manual transmission): | 6 | 5 | |
| Length: | 4239 mm | 4780 mm | 4495 mm |
| Width: | 1790 mm | 1855 mm | 1707 mm |
| Width including mirrors: | 1841 mm | ||
| Height: | 1291 mm | 1340 mm | 1425 mm |
| Wheelbase: | 2496 mm | 2685 mm | 2637 mm |
| Front track: | 1511 mm | 1555 mm | 1484 mm |
| Rear (Back) track: | 1559 mm | 1560 mm | 1487 mm |
| Minimum volume of Luggage (trunk): | 320 l | 480 l | |
| Maximum amount of Luggage (trunk): | 790 l | ||
| Front suspension: | Wishbone | ||
| Rear suspension: | Helical spring | ||
| Max weight: | 1750 kg | 2210 kg | 1820 kg |
| Front brakes: | Ventilated discs | Ventilated discs | |
| Rear brakes: | Disc | Disc | |
| Kerb Weight: | 1495 kg | 1790 kg | 1300 kg |
| ABS: | yes | yes | |
| Steering type: | Steering rack and pinion | ||
| Power steering: | Hydraulic Steering | ||
| Tire size: | 225/45 R17 W | 235/50 R16 | 195/65 R15 |
| Wheel rims size: | 8J x 17 | R16 | 5.5J x 15 |