Comparison Opel Astra H TwinTop 1.8i ECOTEC (125 Hp) & Pontiac Firebird IV Cabrio 5.7i V8 Trans Am (275 Hp)
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| Brand: | Opel | Pontiac |
| Model: | Astra | Firebird |
| Generation: | Astra H TwinTop | Firebird IV Cabrio |
| Engine / modification: | 1.8i ECOTEC (125 Hp) | 5.7i V8 Trans Am (275 Hp) |
| Production start: | 2006 year | 1994 year |
| Production end: | 2010 year | 2000 year |
| Coupe type: | Coupe - Cabriolet | Cabriolet |
| Num. of Doors: | 2 | 2 |
| Num. of seats: | 4 | 4 |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.31 | |
| Fuel tank volume: | 52 l | 59 l |
| Emission standard: | EURO IV | |
| Power: | 125 hp | 275 hp |
| Max power in: | 5400 rpm. | 5000 rpm. |
| Torque: | 168 Nm/3400 rpm. | 441 Nm/2400 rpm. |
| Engine position: | Front, transverse | Front, longitudinal |
| Engine displacement: | 1796 cm3 | 5733 cm3 |
| Fuel System: | Multi-point injection | Multi-point injection |
| Position of cylinders: | Inline | V engine |
| Valvetrain: | DOHC | |
| Number of cylinders: | 4 | 8 |
| Number of valves per cylinder: | 2 | 2 |
| Compression ratio: | 9.2 | 10.3 |
| Piston Stroke: | 79.5 mm | 88.4 mm |
| Cylinder Bore: | 84.8 mm | 101.6 mm |
| Wheel Drive: | Front wheel drive | Rear wheel drive |
| Number of Gears (automatic transmission): | 4 | |
| Number of Gears (manual transmission): | 5 | 6 |
| Length: | 4476 mm | 5004 mm |
| Width: | 1759 mm | 1892 mm |
| Width with mirrors folded: | 1831 mm | |
| Width including mirrors: | 2021 mm | |
| Height: | 1411 mm | 1321 mm |
| Wheelbase: | 2614 mm | 2566 mm |
| Front track: | 1488 mm | 1542 mm |
| Rear (Back) track: | 1481 mm | 1539 mm |
| Ride height(clearance): | 122 mm | |
| Front overhang: | 909 mm | |
| Rear overhang: | 953 mm | |
| Minimum volume of Luggage (trunk): | 205 l | 365 l |
| Maximum amount of Luggage (trunk): | 440 l | 954 l |
| Front suspension: | Helical spring | The depreciated rack |
| Rear suspension: | Transverse stabilizer | Helical spring |
| Max weight: | 1870 kg | |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Disc | Drum |
| Kerb Weight: | 1400 kg | 1584 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Hydraulic Steering | |
| Minimum turning circle (turning diameter): | 11.2 m | |
| Tire size: | 205/55 R16 | 245/50 R16 |
| Wheel rims size: | R16 |