Comparison Infiniti Q70 (facelift 2015) 5.6 V8 (420 Hp) Automatic & Alpina B4 Cabrio (facelift 2017) S 3.0 (440 Hp) Switch-Tronic
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| Brand: | Infiniti | Alpina |
| Model: | Q70 | B4 |
| Generation: | Q70 (facelift 2015) | B4 Cabrio (facelift 2017) |
| Engine / modification: | 5.6 V8 (420 Hp) Automatic | S 3.0 (440 Hp) Switch-Tronic |
| Production start: | 2015 year | 2017 year |
| Production end: | 2018 year | |
| Coupe type: | Sedan | Cabriolet |
| Num. of Doors: | 4 | 2 |
| Num. of seats: | 5 | 4 |
| Fuel consumption / economy - urban: | 14.7 l/100 km | 11.1 l/100 km |
| Fuel consumption / economy - extra urban: | 9.8 l/100 km | 6.7 l/100 km |
| Fuel consumption / economy - combined: | 8.3 l/100 km | |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.27 | |
| Fuel tank volume: | 76 l | 60 l |
| Emission standard: | Euro 6 | |
| CO2 emissions: | 190 g/km | |
| Power: | 420 hp | 440 hp |
| Max power in: | 6000 rpm. | 5500-6250 rpm. |
| Maximum speed: | 304 km/h | |
| Acceleration from 0 to 100 km/h: | 4.3 sec | |
| Torque: | 565 Nm @ 4400 rpm. | 660 Nm @ 3000-4500 rpm. |
| Engine position: | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 5552 cm3 | 2979 cm3 |
| Fuel System: | Direct injection | Direct injection |
| Aspiration / Turbine: | BiTurbo | |
| Position of cylinders: | V engine | Inline |
| Valvetrain: | DOHC, VVEL | |
| Number of cylinders: | 8 | 6 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 11.5 | 10.2 |
| Piston Stroke: | 92 mm | 89.6 mm |
| Cylinder Bore: | 98 mm | 84 mm |
| Wheel Drive: | Rear wheel drive | Rear wheel drive |
| Number of Gears (automatic transmission): | 7 ASC | 8 Switch-Tronic |
| Length: | 4981 mm | 4640 mm |
| Width: | 1844 mm | 1825 mm |
| Height: | 1501 mm | 1380 mm |
| Wheelbase: | 2901 mm | 2810 mm |
| Front track: | 1575 mm | 1552 mm |
| Rear (Back) track: | 1570 mm | 1576 mm |
| Minimum volume of Luggage (trunk): | 422 l | 220 l |
| Maximum amount of Luggage (trunk): | 370 l | |
| Front suspension: | Double wishbone | |
| Rear suspension: | Independent, spring multi-link with stabilizer | |
| Max weight: | 2300 kg | |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Ventilated discs |
| Kerb Weight: | 1834 kg | 1915 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Electric Steering | Electric Steering |
| Minimum turning circle (turning diameter): | 11.2 m | |
| Permitted trailer load with brakes (12%): | 1700 kg | |
| Permitted trailer load without brakes: | 750 kg | |
| Tire size: | 245/50 R18 | 245/30 ZR20; 265/30 ZR20 |
| Wheel rims size: | 8J x 18 | 8J x 20; 9J x 20 |