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