Comparison Alpina B8 Gran Coupe (2021) 4.4 V8 (621 Hp) AWD Switch-Tronic & GMC Sierra 1500 III (GMT900) Regular Cab Long Box 4.8 Vortec V8 (295 Hp) Automatic
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| Brand: | Alpina | GMC |
| Model: | B8 | Sierra 1500 |
| Generation: | B8 Gran Coupe (2021) | Sierra 1500 III (GMT900) Regular Cab Long Box |
| Engine / modification: | 4.4 V8 (621 Hp) AWD Switch-Tronic | 4.8 Vortec V8 (295 Hp) Automatic |
| Production start: | 2021 year | 2007 year |
| Production end: | 2010 year | |
| Coupe type: | Coupe | Pick-up |
| Powertrain Architecture: | Internal Combustion engine | |
| Num. of Doors: | 4 | 2 |
| Num. of seats: | 5 | 3 |
| Fuel consumption / economy - urban: | 16.8 l/100 km | |
| Fuel consumption / economy - extra urban: | 12.4 l/100 km | |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.31 | |
| Fuel tank volume: | 68 l | 128 l |
| Combined fuel consumption (WLTP): | 11.9 l/100 km | |
| Emission standard: | Euro 6d-ISC-FCM | |
| Power: | 621 hp | 295 hp |
| Max power in: | 5500-6500 rpm. | 5600 rpm. |
| Maximum speed: | 324 km/h | |
| Acceleration from 0 to 100 km/h: | 3.4 sec | |
| CO2 emissions (WLTP): | 270 g/km | |
| Torque: | 800 Nm @ 2000-5000 rpm. | 414 Nm @ 4600 rpm. |
| Model Engine: | N63B44T3 | LY2 |
| Engine position: | Front, longitudinal | |
| Engine displacement: | 4395 cm3 | 4807 cm3 |
| Engine oil capacity: | 11.1 l | 5.7 l |
| Coolant: | 12.7 l | |
| Fuel System: | Direct injection | |
| Maximum engine speed: | 6000 rpm. | |
| Aspiration / Turbine: | Naturally aspirated engine | |
| Valvetrain: | OHV | |
| Number of cylinders: | 8 | 8 |
| Number of valves per cylinder: | 4 | 2 |
| Compression ratio: | 10.5 | 9.1 |
| Piston Stroke: | 88.3 mm | 83.06 mm |
| Cylinder Bore: | 89 mm | 96.01 mm |
| Wheel Drive: | All wheel drive (4x4) | Rear wheel drive |
| Number of Gears (automatic transmission): | 8 Switch-Tronic | |
| Length: | 5092 mm | 5702 mm |
| Width: | 1932 mm | |
| Width including mirrors: | 2137 mm | 2031 mm |
| Height: | 1428 mm | 1867 mm |
| Wheelbase: | 3023 mm | 3378 mm |
| Front track: | 1623 mm | 1730 mm |
| Rear (Back) track: | 1666 mm | 1702 mm |
| Ride height(clearance): | 135 mm | 208 mm |
| Approach angle: | 16 ° | |
| Departure angle: | 24.1 ° | |
| Minimum volume of Luggage (trunk): | 440 l | |
| Maximum amount of Luggage (trunk): | 2138 l | |
| Max weight: | 2600 kg | 2903 kg |
| Kerb Weight: | 2175 kg | |
| Steering type: | Steering rack and pinion | |
| Power steering: | Electric Steering | Electric Steering |
| Minimum turning circle (turning diameter): | 12.6 m | 15.4 m |
| Tire size: | Front wheel tires: 245/35 ZR21 96Y | 245/70 R17 |
| Wheel rims size: | Front wheel rims: 8.5J x 21 | 7.5J x 17 |