Comparison Kia Optima IV 1.7 CRDi (141 Hp) & Buick Regal IV Sedan 3.8 V6 (203 Hp) Automatic & Chevrolet Silverado 2500 HD IV (T1XX) Double Cab Long Bed 6.6 V8 (401 Hp) 4WD Automatic
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| Brand: | Kia | Buick | Chevrolet |
| Model: | Optima | Regal | Silverado 2500 HD |
| Generation: | Optima IV | Regal IV Sedan | Silverado 2500 HD IV (T1XX) Double Cab Long Bed |
| Engine / modification: | 1.7 CRDi (141 Hp) | 3.8 V6 (203 Hp) Automatic | 6.6 V8 (401 Hp) 4WD Automatic |
| Production start: | 2015 year | 1997 year | 2020 year |
| Production end: | 2004 year | 2023 year | |
| Coupe type: | Sedan | Sedan | Pick-up |
| Powertrain Architecture: | Internal Combustion engine | ||
| Num. of Doors: | 4 | 4 | 4 |
| Num. of seats: | 5 | 5 | 5 |
| Fuel consumption / economy - urban: | 5.6-5.1 l/100 km | 12.4 l/100 km | |
| Fuel consumption / economy - extra urban: | 4.1-3.7 l/100 km | 8.1 l/100 km | |
| Fuel consumption / economy - combined: | 4.6-4.2 l/100 km | 9.8 l/100 km | |
| Fuel Type: | Diesel | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.32 | ||
| Fuel tank volume: | 70 l | 64 l | 136 l |
| Emission standard: | EURO VI b | ||
| CO2 emissions: | 121-110 g/km | ||
| Power: | 141 hp | 203 hp | 401 hp |
| Max power in: | 4000 rpm. | 5200 rpm. | 5200 rpm. |
| Maximum speed: | 203 km/h | 195 km/h | |
| Acceleration from 0 to 100 km/h: | 10.0 sec | 9.2 sec | |
| Torque: | 340 Nm/1750-2500 rpm. | 305 Nm @ 4000 rpm. | 629 Nm @ 4000 rpm. |
| Model Engine: | L36 | L8T | |
| Engine position: | Front, transverse | Front, transverse | |
| Engine displacement: | 1685 cm3 | 3791 cm3 | |
| Engine oil capacity: | 4.3 l | 7.6 l | |
| Coolant: | 11.5 l | 15.1 l | |
| Fuel System: | Diesel Commonrail | Multi-point injection | |
| Aspiration / Turbine: | Turbo / Intercooler (Turbocharging / Intercooler) | Naturally aspirated engine | |
| Position of cylinders: | Inline | V engine | |
| Valvetrain: | DOHC | - | OHV, VVT |
| Number of cylinders: | 4 | 6 | 8 |
| Number of valves per cylinder: | 4 | 2 | 2 |
| Compression ratio: | 15.7 | 9.4 | 10.8 |
| Piston Stroke: | 90 mm | 86.36 mm | 98 mm |
| Cylinder Bore: | 77.2 mm | 96.52 mm | 103.25 mm |
| Wheel Drive: | Front wheel drive | Front wheel drive | All wheel drive (4x4) |
| Number of Gears (automatic transmission): | 4 Hydramatic | ||
| Number of Gears (manual transmission): | 6 | ||
| Length: | 4855 mm | 4983 mm | 6514 mm |
| Width: | 1860 mm | 1847 mm | |
| Width including mirrors: | 2079 mm | ||
| Height: | 1465 mm | 1438 mm | 2027 mm |
| Wheelbase: | 2805 mm | 2769 mm | 4127 mm |
| Front track: | 1607 mm | 1575 mm | 1731 mm |
| Rear (Back) track: | 1614 mm | 1557 mm | 1736 mm |
| Ride height(clearance): | 135 mm | 258 mm | |
| Minimum volume of Luggage (trunk): | 510 l | 473 l | |
| Maximum amount of Luggage (trunk): | 2364 l | ||
| Front suspension: | Independent, Spring McPherson, with stabilizer | Independent type McPherson | Independent torsion bar, double wishbone |
| Rear suspension: | Double wishbone | Independent, spring | |
| Max weight: | 2070 kg | 2000 kg | 4763 kg |
| Front brakes: | Ventilated discs | Ventilated discs | |
| Rear brakes: | Disc | Disc | |
| Kerb Weight: | 1515 kg | 1600 kg | 3098 kg |
| ABS: | yes | yes | |
| Steering type: | Steering rack and pinion | Steering rack and pinion | Cone worm with recirculation balls |
| Power steering: | Electric Steering | Hydraulic Steering | Hydraulic Steering |
| Minimum turning circle (turning diameter): | 10.9 m | ||
| Permitted trailer load with brakes (12%): | 1800 kg | 7552 kg | |
| Permitted trailer load without brakes: | 750 kg | ||
| Tire size: | 215/60 R16; 215/55 R17; 235/45 R18 | 215/70 R15 | 265/70 R17; 245/75 R17; 275/70 R18 |
| Wheel rims size: | R16; R17; R18 | 6J x 15 | 7.5J x 17; 8J x 18 |