Comparison McLaren 620R 3.8 V8 (620 Hp) SSG & Alpina B4 Cabrio 6.0 (410 Hp) Switch-Tronic
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| Brand: | McLaren | Alpina |
| Model: | 620R | B4 |
| Generation: | 620R | B4 Cabrio |
| Engine / modification: | 3.8 V8 (620 Hp) SSG | 6.0 (410 Hp) Switch-Tronic |
| Production start: | 2019 year | 2014 year |
| Coupe type: | Coupe | Cabriolet |
| Num. of Doors: | 2 | 2 |
| Num. of seats: | 2 | 4 |
| Fuel consumption / economy - urban: | 15.7 l/100 km | 10.8 l/100 km |
| Fuel consumption / economy - extra urban: | 10.2 l/100 km | 6.4 l/100 km |
| Fuel consumption / economy - combined: | 13.1 l/100 km | 8.0 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Fuel tank volume: | 72 l | 60 l |
| Emission standard: | EURO VI | |
| CO2 emissions: | 186 g/km | |
| Power: | 620 hp | 410 hp |
| Max power in: | 7000 rpm. | 5500-6250 rpm. |
| Maximum speed: | 322 km/h | 301 km/h |
| Acceleration from 0 to 100 km/h: | 2.9 sec | 4.5 sec |
| Acceleration from 0 to 200 km/h: | 8.1 sec | |
| Torque: | 620 Nm @ 3500 rpm. | 600 Nm/3000-4000 rpm. |
| Stopping distance 100 km/h - 0: | 29.2 m | |
| stopping distance 200 km/h - 0: | 115.5 m | |
| Model Engine: | M838TE | |
| Engine position: | Middle, longitudinal | Front, longitudinal |
| Engine displacement: | 3799 cm3 | 2979 cm3 |
| Fuel System: | Direct injection | |
| Aspiration / Turbine: | Twin-Turbo | BiTurbo |
| Position of cylinders: | V engine | Inline |
| Number of cylinders: | 8 | 6 |
| Compression ratio: | 10.2 | |
| Piston Stroke: | 89.6 mm | |
| Cylinder Bore: | 84 mm | |
| Wheel Drive: | Rear wheel drive | Rear wheel drive |
| Number of Gears (automatic transmission): | 7 SSG | 8 Switch-Tronic |
| Length: | 4557 mm | 4640 mm |
| Width: | 1944 mm | 1825 mm |
| Width with mirrors folded: | 2045 mm | |
| Width including mirrors: | 2095 mm | |
| Height: | 1194 mm | 1380 mm |
| Wheelbase: | 2670 mm | 2810 mm |
| Front track: | 1680 mm | 1552 mm |
| Rear (Back) track: | 1618 mm | 1576 mm |
| Minimum volume of Luggage (trunk): | 120 l | 220 l |
| Maximum amount of Luggage (trunk): | 370 l | |
| Front suspension: | Double wishbone | |
| Rear suspension: | Double wishbone | |
| Max weight: | 2300 kg | |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Ventilated discs |
| Kerb Weight: | 1386 kg | 1840 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | |
| Power steering: | Electric Steering | Electric Steering |
| Permitted trailer load with brakes (12%): | 1700 kg | |
| Permitted trailer load without brakes: | 750 kg | |
| Tire size: | Front wheel tires: 225/35 R19 | 245/30 ZR20; 265/30 ZR20 |
| Wheel rims size: | Front wheel rims: 8J x 19 | 8J x 20; 9J x 20 |