Comparison Porsche 911 Cabriolet (991 II) Carrera GTS 3.0 (450 Hp) & Opel Vectra B CC (facelift 1999) 1.8i 16V (115 Hp) & BMW 8 Series Gran Coupe (G16) 840i (333 Hp) xDrive Steptronic
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| Brand: | Porsche | Opel | BMW |
| Model: | 911 | Vectra | 8 Series |
| Generation: | 911 Cabriolet (991 II) | Vectra B CC (facelift 1999) | 8 Series Gran Coupe (G16) |
| Engine / modification: | Carrera GTS 3.0 (450 Hp) | 1.8i 16V (115 Hp) | 840i (333 Hp) xDrive Steptronic |
| Production start: | 2017 year | 2000 year | 2020 year |
| Production end: | 2018 year | 2002 year | |
| Coupe type: | Cabriolet | Hatchback | Coupe |
| Num. of Doors: | 2 | 5 | 4 |
| Num. of seats: | 2+2 | 5 | 5 |
| Fuel consumption / economy - urban: | 12.9 l/100 km | 10.6 l/100 km | |
| Fuel consumption / economy - extra urban: | 7.3 l/100 km | 5.8 l/100 km | |
| Fuel consumption / economy - combined: | 9.4 l/100 km | 7.6 l/100 km | |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.32 | 0.29 | |
| Fuel tank volume: | 64 l | 60 l | 68 l |
| Emission standard: | Euro 6 | Euro 6d | |
| CO2 emissions: | 214 g/km | 183 g/km | |
| Power: | 450 hp | 115 hp | 333 hp |
| Max power in: | 6500 rpm. | 5600 rpm. | 5500-6250 rpm. |
| Maximum speed: | 310 km/h | 203 km/h | 250 km/h |
| Acceleration from 0 to 100 km/h: | 4.2 sec | 11 sec | 5.1 sec |
| Acceleration from 0 to 200 km/h: | 13.6 sec | ||
| Torque: | 550 Nm @ 2150−5000 rpm. | 170 Nm @ 3600 rpm. | 500 Nm @ 1700-4000 rpm. |
| Model Engine: | MDC.JA | ||
| Engine position: | Rear, longitudinal | Front, transverse | Front, longitudinal |
| Engine displacement: | 2981 cm3 | 1799 cm3 | 2998 cm3 |
| Engine oil capacity: | 8 l | 6.5 l | |
| Fuel System: | Direct injection | Multi-point injection | Direct injection |
| Maximum engine speed: | 7500 rpm. | ||
| Aspiration / Turbine: | BiTurbo | ||
| Position of cylinders: | Boxer | Inline | Inline |
| Valvetrain: | DOHC | VALVETRONIC | |
| Number of cylinders: | 6 | 4 | 6 |
| Number of valves per cylinder: | 4 | 4 | 4 |
| Compression ratio: | 10 | 10.8 | 11 |
| Piston Stroke: | 76.4 mm | 86 mm | 94.6 mm |
| Cylinder Bore: | 91 mm | 81.6 mm | 82 mm |
| Wheel Drive: | Rear wheel drive | Front wheel drive | All wheel drive (4x4) |
| Number of Gears (automatic transmission): | 8 Steptronic | ||
| Number of Gears (manual transmission): | 7 | 5 | |
| Length: | 4528 mm | 4495 mm | 5074 mm |
| Width: | 1852 mm | 1707 mm | 1932 mm |
| Width including mirrors: | 1978 mm | 1841 mm | |
| Height: | 1291 mm | 1425 mm | 1401 mm |
| Wheelbase: | 2450 mm | 2637 mm | 3023 mm |
| Front track: | 1539 mm | 1484 mm | 1627 mm |
| Rear (Back) track: | 1544 mm | 1487 mm | 1671 mm |
| Ride height(clearance): | 121 mm | ||
| Minimum volume of Luggage (trunk): | 480 l | 440 l | |
| Maximum amount of Luggage (trunk): | 285 l | 790 l | |
| Front suspension: | Independent type McPherson | Coil spring | Double wishbone |
| Rear suspension: | Multi-link independent | Helical spring | Multi-link independent |
| Max weight: | 1970 kg | 1790 kg | 2480 kg |
| Front brakes: | Ventilated discs | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Disc | Ventilated discs |
| Kerb Weight: | 1520 kg | 1279 kg | 1875 kg |
| ABS: | yes | yes | |
| Steering type: | Steering rack and pinion | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Electric Steering | Hydraulic Steering | Electric Steering |
| Max. roof load: | 75 kg | ||
| Minimum turning circle (turning diameter): | 11.1 m | 12.6 m | |
| Tire size: | 245/35 ZR 20; 305/30 ZR 20 | 195/65 R15 | Front wheel tires: 245/45 R18 100Y |
| Wheel rims size: | 9J x 20; 12J x 20 | R15 | Front wheel rims: 8J x 18 |