Comparison GMC Sierra 2500HD V (GMTT1XX) Double Cab Long Bed 6.6 Duramax TD V8 (445 Hp) 4WD Automatic & BMW 6 Series Convertible (F12 LCI, facelift 2015) 650i (450 Hp) Steptronic
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| Brand: | GMC | BMW |
| Model: | Sierra 2500HD | 6 Series |
| Generation: | Sierra 2500HD V (GMTT1XX) Double Cab Long Bed | 6 Series Convertible (F12 LCI, facelift 2015) |
| Engine / modification: | 6.6 Duramax TD V8 (445 Hp) 4WD Automatic | 650i (450 Hp) Steptronic |
| Production start: | 2020 year | 2015 year |
| Production end: | 2023 year | 2018 year |
| Coupe type: | Pick-up | Cabriolet |
| Powertrain Architecture: | Internal Combustion engine | |
| Num. of Doors: | 4 | 2 |
| Num. of seats: | 5 | 4 |
| Fuel consumption / economy - urban: | 12.4-12.7 l/100 km | |
| Fuel consumption / economy - extra urban: | 6.9-7.0 l/100 km | |
| Fuel consumption / economy - combined: | 8.9-9.1 l/100 km | |
| Fuel Type: | Diesel | Petrol (Gasoline) |
| Drag coefficient: | 0.32 | |
| Fuel tank volume: | 136 l | 70 l |
| Emission standard: | EURO VI | |
| CO2 emissions: | 208-213 g/km | |
| Power: | 445 hp | 450 hp |
| Max power in: | 2800 rpm. | 5500-6000 rpm. |
| Maximum speed: | 250 km/h | |
| Acceleration from 0 to 100 km/h: | 4.6 sec | |
| Torque: | 1234 Nm @ 1600 rpm. | 650 Nm @ 2000-4500 rpm. |
| Model Engine: | Duramax L5P | |
| Engine position: | Front, longitudinal | |
| Engine displacement: | 6604 cm3 | 4395 cm3 |
| Engine oil capacity: | 9.5 l | 9.0 l |
| Coolant: | 29.1 l | 14.4 l |
| Fuel System: | Direct injection | |
| Aspiration / Turbine: | Twin-power turbo | |
| Position of cylinders: | V engine | |
| Valvetrain: | OHV | |
| Number of cylinders: | 8 | 8 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 16 | 10 |
| Piston Stroke: | 99 mm | 88.3 mm |
| Cylinder Bore: | 103 mm | 89 mm |
| Wheel Drive: | All wheel drive (4x4) | Rear wheel drive |
| Number of Gears (automatic transmission): | 8 Steptronic | |
| Length: | 6514 mm | 4894 mm |
| Width: | 1894 mm | |
| Width including mirrors: | 2079 mm | |
| Height: | 2027 mm | 1365 mm |
| Wheelbase: | 4127 mm | 2855 mm |
| Front track: | 1731 mm | 1600 mm |
| Rear (Back) track: | 1736 mm | 1665 mm |
| Ride height(clearance): | 258 mm | 123 mm |
| Minimum volume of Luggage (trunk): | 300 l | |
| Maximum amount of Luggage (trunk): | 350 l | |
| Front suspension: | Double wishbone | |
| Rear suspension: | Multi-link independent | |
| Max weight: | 5080 kg | 2425 kg |
| Front brakes: | Disc | |
| Rear brakes: | Disc | |
| Kerb Weight: | 3505 kg | 1930 kg |
| ABS: | yes | |
| Steering type: | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Electric Steering | Electric Steering |
| Minimum turning circle (turning diameter): | 11.7 m | |
| Permitted trailer load with brakes (12%): | 6577 kg | |
| Tire size: | 265/70 R17; 245/75 R17; 265/70 R18; 265/60 R20 | 245/45 R18; 275/45 R18; 245/40 R19; 275/35 R19; 245/35 R20; 275/30 R20 |
| Wheel rims size: | 7.5J x 17; 8J x 18; 8.5J x 20 | 8J x 18; 9J x 18; 8.5J x 19; 9J x 19; 8.5J x 20; 9J x 20 |