Comparison GMC Sierra 2500HD V (GMTT1XX) Double Cab Standard Bed 6.6 Duramax TD V8 (445 Hp) 4WD Automatic & Mercedes-Benz R-class (W251) Long R 320 CDI V6 (224 Hp) 4MATIC G-TRONIC
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| Brand: | GMC | Mercedes-Benz |
| Model: | Sierra 2500HD | R-class |
| Generation: | Sierra 2500HD V (GMTT1XX) Double Cab Standard Bed | R-class (W251) Long |
| Engine / modification: | 6.6 Duramax TD V8 (445 Hp) 4WD Automatic | R 320 CDI V6 (224 Hp) 4MATIC G-TRONIC |
| Production start: | 2020 year | 2007 year |
| Production end: | 2023 year | 2009 year |
| Coupe type: | Pick-up | Combi |
| Powertrain Architecture: | Internal Combustion engine | |
| Num. of Doors: | 4 | 5 |
| Num. of seats: | 5 | 5-7 |
| Fuel consumption / economy - combined: | 9.3 l/100 km | |
| Fuel Type: | Diesel | Diesel |
| Fuel tank volume: | 111 l | 80 l |
| Emission standard: | EURO V | |
| CO2 emissions: | 246 g/km | |
| Power: | 445 hp | 224 hp |
| Max power in: | 2800 rpm. | |
| Maximum speed: | 222 km/h | |
| Acceleration from 0 to 100 km/h: | 8.8 sec | |
| Torque: | 1234 Nm @ 1600 rpm. | 510 Nm |
| Model Engine: | Duramax L5P | |
| Engine position: | Front, longitudinal | |
| Engine displacement: | 6604 cm3 | 2987 cm3 |
| Engine oil capacity: | 9.5 l | |
| Coolant: | 29.1 l | |
| Fuel System: | Diesel Commonrail | |
| Maximum engine speed: | 4500 . rpm. | |
| Aspiration / Turbine: | Turbocharger / Intercooler | |
| Position of cylinders: | V engine | |
| Valvetrain: | OHV | |
| Number of cylinders: | 8 | 6 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 16 | 16.5 |
| Piston Stroke: | 99 mm | 92 mm |
| Cylinder Bore: | 103 mm | 83 mm |
| Wheel Drive: | All wheel drive (4x4) | All wheel drive (4x4) |
| Number of Gears (automatic transmission): | 7G-TRONIC | |
| Length: | 6107 mm | 5157 mm |
| Width: | 1922 mm | |
| Width including mirrors: | 2079 mm | |
| Height: | 2031 mm | 1659 mm |
| Wheelbase: | 3795 mm | 3215 mm |
| Front track: | 1731 mm | |
| Rear (Back) track: | 1736 mm | |
| Ride height(clearance): | 259 mm | |
| Maximum amount of Luggage (trunk): | 2385 l | |
| Front suspension: | Double wishbone | |
| Rear suspension: | Independent, spring multi-link with stabilizer | |
| Max weight: | 4990 kg | 2895 kg |
| Front brakes: | Disc | |
| Rear brakes: | Disc | |
| Kerb Weight: | 3441 kg | 2295 kg |
| ABS: | yes | |
| Steering type: | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Electric Steering | Hydraulic Steering |
| Max. roof load: | 100 kg | |
| Permitted trailer load with brakes (12%): | 6577 kg | 2100 kg |
| Permitted trailer load without brakes: | 750 kg | |
| Tire size: | 235/80 R17; 265/70 R17; 245/75 R17; 265/70 R18; 265/60 R20 | 235/65 R17 |
| Wheel rims size: | 7.5J x 17; 8J x 18; 8.5J x 20 | 7.5J x 17 |