2007 GMC Sierra vs. 2005 Kia Optima
To start off, 2007 GMC Sierra is newer by 2 year(s). Which means there will be less support and parts availability for 2005 Kia Optima. In addition, the cost of maintenance, including insurance, on 2005 Kia Optima would be higher. At 5,357 cc (8 cylinders), 2007 GMC Sierra is equipped with a bigger engine. In terms of performance, 2007 GMC Sierra (315 HP @ 5200 RPM) has 145 more horse power than 2005 Kia Optima. (170 HP @ 4000 RPM). In normal driving conditions, 2007 GMC Sierra should accelerate faster than 2005 Kia Optima. With that said, vehicle weight also plays an important factor in acceleration. 2007 GMC Sierra weights approximately 948 kg more than 2005 Kia Optima. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2007 GMC Sierra is four wheel drive (4WD), it will have significant more traction and grip than 2005 Kia Optima. In wet, icy, snow, or gravel driving conditions, 2007 GMC Sierra will offer significantly more control. With that said, do keep in mind that many other factors such as speed and the wear on your tires can also have significant impact on traction and control. Let's talk about torque, 2007 GMC Sierra (458 Nm) has 217 more torque (in Nm) than 2005 Kia Optima. (241 Nm). This means 2007 GMC Sierra will have an easier job in driving up hills or pulling heavy equipment than 2005 Kia Optima.
Compare all specifications:
| 2007 GMC Sierra | 2005 Kia Optima | |
| Make | GMC | Kia |
| Model | Sierra | Optima |
| Year Released | 2007 | 2005 |
| Body Type | Pickup | Sedan |
| Engine Position | Front | Front |
| Engine Size | 5357 cc | 2671 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 315 HP | 170 HP |
| Engine RPM | 5200 RPM | 4000 RPM |
| Torque | 458 Nm | 241 Nm |
| Engine Bore Size | 96 mm | 87 mm |
| Engine Stroke Size | 92 mm | 75 mm |
| Engine Compression Ratio | 9.4:1 | 10.0:1 |
| Drive Type | 4WD | Front |
| Number of Seats | 6 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 2435 kg | 1487 kg |
| Vehicle Length | 6320 mm | 4730 mm |
| Vehicle Width | 2040 mm | 1820 mm |
| Vehicle Height | 1880 mm | 1420 mm |
| Wheelbase Size | 4010 mm | 2710 mm |
| Fuel Consumption Highway | 10.7 L/100km | 8.9 L/100km |
| Fuel Consumption City | 14.7 L/100km | 11.9 L/100km |
| Fuel Consumption Overall | 13.1 L/100km | 10.4 L/100km |
| Fuel Tank Capacity | 129 L | 65 L |
