Comparison BMW Z1 (E30) 2.5 (170 Hp) & BMW Z4 (E85, facelift 2006) 2.5i (177 Hp) Automatic
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| Brand: | BMW | BMW |
| Model: | Z1 | Z4 |
| Generation: | Z1 (E30) | Z4 (E85, facelift 2006) |
| Engine / modification: | 2.5 (170 Hp) | 2.5i (177 Hp) Automatic |
| Production start: | 1988 year | 2006 year |
| Production end: | 1991 year | 2008 year |
| Coupe type: | Cabriolet | Cabriolet |
| Num. of Doors: | 2 | 2 |
| Num. of seats: | 2 | 2 |
| Fuel consumption / economy - urban: | 12.9 l/100 km | 12.0 l/100 km |
| Fuel consumption / economy - extra urban: | 6.8 l/100 km | 6.3 l/100 km |
| Fuel consumption / economy - combined: | 8.4 l/100 km | 8.4 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.36 | |
| Fuel tank volume: | 58 l | 55 l |
| Emission standard: | Euro 4 | |
| Power: | 170 hp | 177 hp |
| Max power in: | 5800 rpm. | 5800 rpm. |
| Maximum speed: | 225 km/h | 225 km/h |
| Acceleration from 0 to 100 km/h: | 7.9 sec | 7.5 sec |
| Torque: | 222 Nm @ 4300 rpm. | 230 Nm @ 3500-5000 rpm. |
| Model Engine: | M20B25 | N52B25 |
| Engine position: | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 2494 cm3 | 2497 cm3 |
| Engine oil capacity: | 4.25 l | 6.5 l |
| Coolant: | 10.5 l | |
| Fuel System: | Multi-point injection | Multi-point injection |
| Position of cylinders: | Inline | Inline |
| Valvetrain: | OHC | DOHC |
| Number of cylinders: | 6 | 6 |
| Number of valves per cylinder: | 2 | 4 |
| Compression ratio: | 8.8 | 11 |
| Piston Stroke: | 75 mm | 78.8 mm |
| Cylinder Bore: | 84 mm | 82 mm |
| Wheel Drive: | Rear wheel drive | Rear wheel drive |
| Number of Gears (automatic transmission): | - | 6 |
| Number of Gears (manual transmission): | 5 | |
| Length: | 3920 mm | 4091 mm |
| Width: | 1690 mm | 1781 mm |
| Height: | 1275 mm | 1299 mm |
| Wheelbase: | 2445 mm | 2495 mm |
| Front track: | 1455 mm | 1473 mm |
| Rear (Back) track: | 1470 mm | 1523 mm |
| Minimum volume of Luggage (trunk): | 260 l | 240 l |
| Maximum amount of Luggage (trunk): | 260 l | |
| Front suspension: | Coil spring | Independent, Spring McPherson, with stabilizer |
| Rear suspension: | Helical spring | Helical spring |
| Max weight: | 1460 kg | 1570 kg |
| Front brakes: | Disc | Disc |
| Rear brakes: | Disc | Disc |
| Kerb Weight: | 1250 kg | 1275 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | |
| Power steering: | Hydraulic Steering | |
| Minimum turning circle (turning diameter): | 9.8 m | |
| Tire size: | 225/45 R16 | 225/50 R16 |
| Wheel rims size: | R16 | 7J x 16 |