Comparison Porsche 911 GT3 3.8 (475 Hp) PDK & Opel Astra H GTC 1.8i (140 Hp) & Opel Astra J 2.0 CDTI (160 Hp) & Opel Astra J 1.7 CDTI (125 Hp)
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| Brand: | Porsche | Opel | Opel | Opel |
| Model: | 911 | Astra | Astra | Astra |
| Generation: | 911 GT3 | Astra H GTC | Astra J | Astra J |
| Engine / modification: | 3.8 (475 Hp) PDK | 1.8i (140 Hp) | 2.0 CDTI (160 Hp) | 1.7 CDTI (125 Hp) |
| Production start: | 2013 year | 2005 year | 2009 year | 2009 year |
| Production end: | 2010 year | 2012 year | 2012 year | |
| Coupe type: | Coupe | Hatchback | Hatchback | Hatchback |
| Num. of Doors: | 2 | 3 | 5 | 5 |
| Num. of seats: | 2 | 5 | 5 | 5 |
| Fuel consumption / economy - urban: | 18.9 l/100 km | 10.4 l/100 km | 6.4 l/100 km | 5.7 l/100 km |
| Fuel consumption / economy - extra urban: | 8.9 l/100 km | 6.1 l/100 km | 4.1 l/100 km | 4.2 l/100 km |
| Fuel consumption / economy - combined: | 12.4 l/100 km | 7.7 l/100 km | 4.9 l/100 km | 4.7 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) | Diesel | Diesel |
| Drag coefficient: | 0.32 | 0.31 | 0.31 | |
| Fuel tank volume: | 64 l | 52 l | 56 l | 56 l |
| Emission standard: | EURO V | EURO IV | Euro 5 | Euro 5 |
| CO2 emissions: | 289 g/km | 175 g/km | 129 g/km | 125 g/km |
| Power: | 475 hp | 140 hp | 160 hp | 125 hp |
| Max power in: | 8250 rpm. | 6300 rpm. | 4000 rpm. | 4000 rpm. |
| Maximum speed: | 315 km/h | 209 km/h | 215 km/h | 195 km/h |
| Acceleration from 0 to 100 km/h: | 3.5 sec | 10.1 sec | 9 sec | 11.5 sec |
| Torque: | 440 Nm/6250 rpm. | 175 Nm/3800 rpm. | 350 Nm @ 1750-2500 rpm. | 280 Nm @ 2300 rpm. |
| Model Engine: | A20DTH | A17DTR | ||
| Engine position: | Rear, longitudinal | Front, transverse | Front, transverse | Front, transverse |
| Engine displacement: | 3799 cm3 | 1796 cm3 | 1956 cm3 | 1686 cm3 |
| Engine oil capacity: | 4.5 l | 4.0 l | ||
| Fuel System: | Direct injection | Multi-point injection | Diesel Commonrail | Diesel Commonrail |
| Aspiration / Turbine: | Turbo / Intercooler (Turbocharging / Intercooler) | Turbo / Intercooler (Turbocharging / Intercooler) | ||
| Position of cylinders: | Boxer | Inline | Inline | Inline |
| Valvetrain: | DOHC | |||
| Number of cylinders: | 6 | 4 | 4 | 4 |
| Number of valves per cylinder: | 4 | 4 | 4 | 4 |
| Compression ratio: | 12.9 | 10.5 | 18 | 18 |
| Piston Stroke: | 77.5 mm | 88.2 mm | 90.4 mm | 86 mm |
| Cylinder Bore: | 102 mm | 80.5 mm | 83 mm | 79 mm |
| Wheel Drive: | Rear wheel drive | Front wheel drive | Front wheel drive | Front wheel drive |
| Number of Gears (automatic transmission): | 7 PDK | 4 | 6 | |
| Number of Gears (manual transmission): | 5 | 6 | 6 | |
| Length: | 4545 mm | 4290 mm | 4419 mm | 4419 mm |
| Width: | 1852 mm | 1753 mm | 1814 mm | 1814 mm |
| Width including mirrors: | 2033 mm | 2013 mm | 2013 mm | |
| Height: | 1269 mm | 1415 mm | 1510 mm | 1510 mm |
| Wheelbase: | 2457 mm | 2614 mm | 2685 mm | 2685 mm |
| Front track: | 1551 mm | 1488 mm | 1541 mm | 1541 mm |
| Rear (Back) track: | 1555 mm | 1488 mm | 1581 mm | 1551 mm |
| Ride height(clearance): | 140 mm | 160 mm | 160 mm | |
| Front overhang: | 910 mm | |||
| Rear overhang: | 766 mm | |||
| Minimum volume of Luggage (trunk): | 385 l | 380 l | 370 l | 370 l |
| Maximum amount of Luggage (trunk): | 1235 l | 1235 l | ||
| Front suspension: | Independent type McPherson | The depreciated rack | ||
| Rear suspension: | Multi-link independent | The depreciated rack | ||
| Max weight: | 1720 kg | 1785 kg | 2065 kg | 2065 kg |
| Front brakes: | Ventilated discs | Ventilated discs | Ventilated discs | |
| Rear brakes: | Ventilated discs | Disc | Disc | |
| Kerb Weight: | 1430 kg | 1210 kg | 1515 kg | 1515 kg |
| ABS: | yes | yes | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion | Steering rack and pinion | Steering rack and pinion |
| Minimum turning circle (turning diameter): | 11.4 m | 11.4 m | ||
| Tire size: | 245/35 ZR20; 305/30 ZR20 | 205/55 R16 | 225/50 R17 | 215/60 R16 |
| Wheel rims size: | 9 J x 20; 12 J x 20 | 6.5J x 16 | R17 | R16 |