Comparison Mercedes-Benz R-class (W251) R 300 CDI V6 BlueEFFICIENCY (190 Hp) G-TRONIC & GMC Sierra HD Crew Cab Standard Box 3500 6.6 TD V8 (445 Hp) SRW Automatic
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| Brand: | Mercedes-Benz | GMC |
| Model: | R-class | Sierra 2500HD |
| Generation: | R-class (W251) | Sierra HD Crew Cab Standard Box |
| Engine / modification: | R 300 CDI V6 BlueEFFICIENCY (190 Hp) G-TRONIC | 3500 6.6 TD V8 (445 Hp) SRW Automatic |
| Production start: | 2009 year | 2018 year |
| Production end: | 2010 year | |
| Coupe type: | Combi | Pick-up |
| Num. of Doors: | 5 | 4 |
| Num. of seats: | 5 | 5 |
| Fuel consumption / economy - combined: | 7.6 l/100 km | |
| Fuel Type: | Diesel | Diesel |
| Fuel tank volume: | 80 l | 136 l |
| Emission standard: | Euro 5 | |
| CO2 emissions: | 199 g/km | |
| Power: | 190 hp | 445 hp |
| Max power in: | 3800 rpm. | 2800 rpm. |
| Maximum speed: | 215 km/h | |
| Acceleration from 0 to 100 km/h: | 9.5 sec | |
| Torque: | 440 Nm @ 1400-2800 rpm. | 1234 Nm @ 1600 rpm. |
| Model Engine: | OM 642.950 | DURAMAX L5P |
| Engine position: | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 2987 cm3 | 6588 cm3 |
| Engine oil capacity: | 8.5 l | 9.5 l |
| Coolant: | 10.1-13 l | |
| Fuel System: | Diesel Commonrail | Diesel Commonrail |
| Aspiration / Turbine: | Turbocharger / Intercooler | Turbocharger |
| Position of cylinders: | V engine | V engine |
| Number of cylinders: | 6 | 8 |
| Number of valves per cylinder: | 4 | |
| Compression ratio: | 15.5 | 16 |
| Piston Stroke: | 99 mm | |
| Cylinder Bore: | 103 mm | |
| Wheel Drive: | Rear wheel drive | Rear wheel drive |
| Number of Gears (automatic transmission): | 7G-TRONIC | 6 |
| Length: | 4922 mm | 6083 mm |
| Width: | 1922 mm | |
| Width including mirrors: | 2045 mm | |
| Height: | 1674 mm | 1988 mm |
| Wheelbase: | 2980 mm | 3904 mm |
| Front track: | 1661 mm | |
| Rear (Back) track: | 1651 mm | |
| Minimum volume of Luggage (trunk): | 550 l | |
| Maximum amount of Luggage (trunk): | 1950 l | 1727 l |
| Front suspension: | Double wishbone | Torsion |
| Rear suspension: | Independent, spring multi-link with stabilizer | The spring |
| Max weight: | 2840 kg | 5035 kg |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Disc | Ventilated discs |
| Kerb Weight: | 2185 kg | 3302 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Hydraulic Steering | Electric Steering |
| Minimum turning circle (turning diameter): | 12 m | |
| Permitted trailer load with brakes (12%): | 2100 kg | 5897 kg |
| Permitted trailer load without brakes: | 750 kg | |
| Tire size: | 235/65 R17 | 245/75 R17; 265/70 R17; 265/70 R18; 265/60 R20 |
| Wheel rims size: | R17 | 7J x 17; 7.5J x 17; 8J x 18; 8J x 20 |