Comparison Kia Optima IV Sportswagon (facelift 2018) 2.0 GDI (202 Hp) Plug-in Hybrid Automatic & GMC Sierra 2500HD III (GMT900) Extended Cab Long Box 6.6 Duramax TD V8 (365 Hp) Automatic
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| Brand: | Kia | GMC |
| Model: | Optima | Sierra 2500HD |
| Generation: | Optima IV Sportswagon (facelift 2018) | Sierra 2500HD III (GMT900) Extended Cab Long Box |
| Engine / modification: | 2.0 GDI (202 Hp) Plug-in Hybrid Automatic | 6.6 Duramax TD V8 (365 Hp) Automatic |
| Production start: | 2018 year | 2007 year |
| Production end: | 2010 year | |
| Coupe type: | Combi | Pick-up |
| Powertrain Architecture: | Internal Combustion engine | |
| Num. of Doors: | 5 | 2 |
| Num. of seats: | 5 | 5 |
| Fuel consumption / economy - combined: | 1.5 l/100 km | |
| Fuel Type: | Petrol / electricity | Diesel |
| Drag coefficient: | 0.28 | |
| Fuel tank volume: | 55 l | 129 l |
| CO2 emissions: | 33 g/km | |
| Power: | 152 hp | 365 hp |
| Max power in: | 6000 rpm. | 3200 rpm. |
| Maximum speed: | 192 km/h | |
| Torque: | 189 Nm @ 5000 rpm. | 895 Nm @ 1600 rpm. |
| Model Engine: | Duramax LMM | |
| Engine position: | Front, transverse | |
| Engine displacement: | 1999 cm3 | 6599 cm3 |
| Engine oil capacity: | 9.5 l | |
| Coolant: | 24 l | |
| Fuel System: | Direct injection | |
| Maximum engine speed: | 3450 rpm. | |
| Position of cylinders: | Inline | |
| Valvetrain: | CVVT | OHV |
| Number of cylinders: | 4 | 8 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 13.5 | 16.8 |
| Piston Stroke: | 97 mm | 99 mm |
| Cylinder Bore: | 81 mm | 103 mm |
| All-electric range: | 53 km | |
| Electric motor power: | 68 | |
| Electric motor Torque: | 205 @ 0-2330 rpm. Nm | |
| Battery capacity: | 11.26 kWh | |
| ICE Torque: | 189 Nm/5000 rpm. | |
| ICE power: | 152 hp | |
| System power: | 202 Hp @ 6 hp/ rpm. | |
| System torque: | 375 Nm @ 2 Nm/ rpm. | |
| Wheel Drive: | Front wheel drive | Rear wheel drive |
| Number of Gears (manual transmission): | 6 | |
| Length: | 4855 mm | 6330 mm |
| Width: | 1860 mm | |
| Width including mirrors: | 2436 mm | |
| Height: | 1470 mm | 1930 mm |
| Wheelbase: | 2805 mm | 4001 mm |
| Front track: | 1744 mm | |
| Rear (Back) track: | 1676 mm | |
| Ride height(clearance): | 243 mm | |
| Minimum volume of Luggage (trunk): | 440 l | |
| Maximum amount of Luggage (trunk): | 1574 l | 2138 l |
| Front suspension: | Independent, Spring McPherson, with stabilizer | Independent torsion bar, double wishbone |
| Rear suspension: | Independent, spring multi-link with stabilizer | |
| Max weight: | 4173 kg | |
| Front brakes: | Ventilated discs | |
| Rear brakes: | Disc | |
| Kerb Weight: | 1815 kg | 2915 kg |
| ABS: | yes | |
| Steering type: | Steering rack and pinion | Cone worm with recirculation balls |
| Power steering: | Electric Steering | |
| Max. roof load: | 100 kg | |
| Minimum turning circle (turning diameter): | 10.9 m | 16 m |
| Permitted trailer load with brakes (12%): | 1500 kg | 5897 kg |
| Permitted trailer load without brakes: | 750 kg | |
| Tire size: | 215/55 R17 | 245/75 R16; 265/75 R17 |
| Wheel rims size: | 7.0J x 17 | 6.5J x 16; 7.5J x 17 |