Comparison Porsche 911 Cabriolet (997, facelift 2008) Carrera 3.6 (345 Hp) & Pontiac Firebird IV Cabrio 5.7i V8 (329 Hp) Automatic
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| Brand: | Porsche | Pontiac |
| Model: | 911 | Firebird |
| Generation: | 911 Cabriolet (997, facelift 2008) | Firebird IV Cabrio |
| Engine / modification: | Carrera 3.6 (345 Hp) | 5.7i V8 (329 Hp) Automatic |
| Production start: | 2008 year | 2000 year |
| Production end: | 2012 year | 2002 year |
| Coupe type: | Cabriolet | Cabriolet |
| Num. of Doors: | 2 | 2 |
| Num. of seats: | 4 | 4 |
| Fuel consumption / economy - urban: | 15.6 l/100 km | 13.1 l/100 km |
| Fuel consumption / economy - extra urban: | 7.5 l/100 km | 9.1 l/100 km |
| Fuel consumption / economy - combined: | 10.4 l/100 km | 11.2 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.30 | |
| Fuel tank volume: | 64 l | 63 l |
| Emission standard: | Euro 5 | |
| CO2 emissions: | 245 g/km | |
| Power: | 345 hp | 329 hp |
| Max power in: | 6500 rpm. | 5200 rpm. |
| Maximum speed: | 289 km/h | 250 km/h |
| Acceleration from 0 to 100 km/h: | 5.1 sec | 6 sec |
| Torque: | 390 Nm @ 4400 rpm. | 475 Nm @ 4400 rpm. |
| Model Engine: | MA1.01 | |
| Engine position: | Rear, longitudinal | Front, longitudinal |
| Engine displacement: | 3614 cm3 | 5665 cm3 |
| Engine oil capacity: | 7.5 l | |
| Coolant: | 29-32 l | |
| Fuel System: | Direct injection | Multi-point injection |
| Position of cylinders: | Boxer | V engine |
| Number of cylinders: | 8 | |
| Number of valves per cylinder: | 2 | |
| Compression ratio: | 12.5 | 10.1 |
| Piston Stroke: | 92 mm | |
| Cylinder Bore: | 99 mm | |
| Wheel Drive: | Rear wheel drive | Rear wheel drive |
| Number of Gears (automatic transmission): | 4 | |
| Number of Gears (manual transmission): | 6 | |
| Length: | 4435 mm | 4923 mm |
| Width: | 1808 mm | 1892 mm |
| Height: | 1310 mm | 1331 mm |
| Wheelbase: | 2350 mm | 2568 mm |
| Front track: | 1542 mm | |
| Rear (Back) track: | 1539 mm | |
| Minimum volume of Luggage (trunk): | 215 l | |
| Maximum amount of Luggage (trunk): | 135 l | |
| Front suspension: | McPherson | The depreciated rack |
| Rear suspension: | Multi-link independent | Helical spring |
| Max weight: | 1880 kg | |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Ventilated discs |
| Kerb Weight: | 1500 kg | 1635 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Hydraulic Steering | Hydraulic Steering |
| Minimum turning circle (turning diameter): | 10.9 m | |
| Tire size: | 235/40 ZR18; 265/40 ZR18 | 235/55 R16 |
| Wheel rims size: | 8J x 18; 10.5J x 18 | R16 |