Comparison BMW Z4 (G29) 20i (197 Hp) sDrive Steptronic & Opel Astra G Coupe 2.0 16V Turbo (192 Hp)
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| Brand: | BMW | Opel |
| Model: | Z4 | Astra |
| Generation: | Z4 (G29) | Astra G Coupe |
| Engine / modification: | 20i (197 Hp) sDrive Steptronic | 2.0 16V Turbo (192 Hp) |
| Production start: | 2018 year | 2001 year |
| Production end: | 2002 year | |
| Coupe type: | Cabriolet | Coupe |
| Num. of Doors: | 2 | 2 |
| Num. of seats: | 2 | 2+2 |
| Fuel consumption / economy - urban: | 7.3-7.4 l/100 km | 12.5 l/100 km |
| Fuel consumption / economy - extra urban: | 5.0-5.4 l/100 km | 6.8 l/100 km |
| Fuel consumption / economy - combined: | 6.0-6.1 l/100 km | 8.9 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.29 | 0.30 |
| Fuel tank volume: | 52 l | 52 l |
| Emission standard: | Euro 6 d | Euro 4 |
| CO2 emissions: | 137-139 g/km | 214 g/km |
| Power: | 197 hp | 192 hp |
| Max power in: | 4500-6500 rpm. | 5400 rpm. |
| Maximum speed: | 226 km/h | 231 km/h |
| Acceleration from 0 to 100 km/h: | 6.6 sec | 7.8 sec |
| Torque: | 320 Nm @ 1450-4200 rpm. | 250 Nm @ 1950-5300 rpm. |
| Model Engine: | B48B20 | Z20LET |
| Engine position: | Front, longitudinal | Front, transverse |
| Engine displacement: | 1998 cm3 | 1998 cm3 |
| Engine oil capacity: | 5.25 l | 4.25 l |
| Coolant: | 7.4 l | |
| Fuel System: | Direct injection | Multi-point injection |
| Aspiration / Turbine: | Twin-power turbo | Turbocharger |
| Position of cylinders: | Inline | Inline |
| Valvetrain: | DOHC | |
| Number of cylinders: | 4 | 4 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 10.2 | 8.8 |
| Piston Stroke: | 94.6 mm | 86 mm |
| Cylinder Bore: | 82 mm | 86 mm |
| Wheel Drive: | Rear wheel drive | Front wheel drive |
| Number of Gears (automatic transmission): | 8 Steptronic | |
| Number of Gears (manual transmission): | 5 | |
| Length: | 4324 mm | 4267 mm |
| Width: | 1864 mm | 1709 mm |
| Width including mirrors: | 2024 mm | 1967 mm |
| Height: | 1304 mm | 1390 mm |
| Wheelbase: | 2470 mm | 2606 mm |
| Front track: | 1609 mm | 1467 mm |
| Rear (Back) track: | 1616 mm | 1456 mm |
| Ride height(clearance): | 117 mm | |
| Front overhang: | 907 mm | |
| Rear overhang: | 947 mm | |
| Minimum volume of Luggage (trunk): | 281 l | 460 l |
| Front suspension: | Double wishbone | Independent, Spring McPherson, with stabilizer |
| Rear suspension: | Multi-link independent | Semi-independent, spring |
| Max weight: | 1740 kg | 1660 kg |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Disc |
| Kerb Weight: | 1420 kg | 1290 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Electric Steering | Hydraulic Steering |
| Max. roof load: | 100 kg | |
| Minimum turning circle (turning diameter): | 11.0 m | 11.5 m |
| Permitted towbar download: | 75 kg | |
| Tire size: | Front wheel tires: 225/50 R17 | 215/45 R17 |
| Wheel rims size: | Front wheel rims: 7.5J x 17 | 7.5J x 17 |