Comparison Mercedes-Benz R-class (W251, facelift 2010) Long R 350 CDI V6 (265 Hp) 4MATIC G-TRONIC & GMC Sierra 2500HD III (GMT900) Extended Cab Long Box 6.6 Duramax TD V8 (365 Hp) 4WD Automatic
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| Brand: | Mercedes-Benz | GMC |
| Model: | R-class | Sierra 2500HD |
| Generation: | R-class (W251, facelift 2010) Long | Sierra 2500HD III (GMT900) Extended Cab Long Box |
| Engine / modification: | R 350 CDI V6 (265 Hp) 4MATIC G-TRONIC | 6.6 Duramax TD V8 (365 Hp) 4WD Automatic |
| Production start: | 2010 year | 2007 year |
| Production end: | 2014 year | 2010 year |
| Coupe type: | Combi | Pick-up |
| Powertrain Architecture: | Internal Combustion engine | |
| Num. of Doors: | 5 | 2 |
| Num. of seats: | 5-7 | 5 |
| Fuel consumption / economy - urban: | 11 l/100 km | |
| Fuel consumption / economy - extra urban: | 7 l/100 km | |
| Fuel consumption / economy - combined: | 8.5 l/100 km | |
| Fuel Type: | Diesel | Diesel |
| Fuel tank volume: | 80 l | 129 l |
| Emission standard: | EURO V | |
| CO2 emissions: | 223 g/km | |
| Power: | 265 hp | 365 hp |
| Max power in: | 3800 rpm. | 3200 rpm. |
| Maximum speed: | 235 km/h | |
| Acceleration from 0 to 100 km/h: | 7.6 sec | |
| Torque: | 620 Nm @ 1600-2400 rpm. | 895 Nm @ 1600 rpm. |
| Model Engine: | Duramax LMM | |
| Engine position: | Front, longitudinal | |
| Engine displacement: | 2987 cm3 | 6599 cm3 |
| Engine oil capacity: | 9.5 l | |
| Coolant: | 24 l | |
| Fuel System: | Diesel Commonrail | |
| Maximum engine speed: | 3450 rpm. | |
| Aspiration / Turbine: | Turbocharger / Intercooler | |
| Position of cylinders: | V engine | |
| Valvetrain: | OHV | |
| Number of cylinders: | 6 | 8 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 15.5 | 16.8 |
| Piston Stroke: | 99 mm | |
| Cylinder Bore: | 103 mm | |
| Wheel Drive: | All wheel drive (4x4) | All wheel drive (4x4) |
| Number of Gears (automatic transmission): | 7G-TRONIC | |
| Length: | 5157 mm | 6330 mm |
| Width: | 1922 mm | |
| Width including mirrors: | 2183 mm | 2436 mm |
| Height: | 1674 mm | 1930 mm |
| Wheelbase: | 3215 mm | 4001 mm |
| Front track: | 1661 mm | 1744 mm |
| Rear (Back) track: | 1651 mm | 1676 mm |
| Ride height(clearance): | 243 mm | |
| Front overhang: | 922 mm | |
| Rear overhang: | 1020 mm | |
| Minimum volume of Luggage (trunk): | 633 l | |
| Maximum amount of Luggage (trunk): | 2385 l | 2138 l |
| Front suspension: | Double wishbone | Independent torsion bar, double wishbone |
| Rear suspension: | Independent, spring multi-link with stabilizer | |
| Max weight: | 2910 kg | 4173 kg |
| Front brakes: | Disc | |
| Rear brakes: | Disc | |
| Kerb Weight: | 2220 kg | 3036 kg |
| ABS: | yes | |
| Steering type: | Cone worm with recirculation balls | |
| Minimum turning circle (turning diameter): | 16 m | |
| Permitted trailer load with brakes (12%): | 2100 kg | 5897 kg |
| Permitted trailer load without brakes: | 750 kg | |
| Tire size: | 255/55 R18 | 245/75 R16; 265/75 R17 |
| Wheel rims size: | R18 | 6.5J x 16; 7.5J x 17 |