2008 Cadillac STS vs. 2005 Kia Optima
To start off, 2008 Cadillac STS is newer by 3 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 4,565 cc (8 cylinders), 2008 Cadillac STS is equipped with a bigger engine. In terms of performance, 2008 Cadillac STS (321 HP @ 6400 RPM) has 151 more horse power than 2005 Kia Optima. (170 HP @ 4000 RPM). In normal driving conditions, 2008 Cadillac STS should accelerate faster than 2005 Kia Optima. With that said, vehicle weight also plays an important factor in acceleration. 2008 Cadillac STS weights approximately 325 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 2008 Cadillac STS is rear wheel drive (RWD), it offers better handling in dry conditions; in addition, if you are looking to drift, it will be much easier to do with 2008 Cadillac STS. However, in wet, icy, snow, or gravel driving conditions, 2005 Kia Optima, being front wheel drive (FWD), will offer much better control with better grip. 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, 2008 Cadillac STS (427 Nm) has 186 more torque (in Nm) than 2005 Kia Optima. (241 Nm). This means 2008 Cadillac STS will have an easier job in driving up hills or pulling heavy equipment than 2005 Kia Optima.
Compare all specifications:
| 2008 Cadillac STS | 2005 Kia Optima | |
| Make | Cadillac | Kia |
| Model | STS | Optima |
| Year Released | 2008 | 2005 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4565 cc | 2671 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 321 HP | 170 HP |
| Engine RPM | 6400 RPM | 4000 RPM |
| Torque | 427 Nm | 241 Nm |
| Engine Bore Size | 93 mm | 87 mm |
| Engine Stroke Size | 84 mm | 75 mm |
| Engine Compression Ratio | 10.5:1 | 10.0:1 |
| Drive Type | Rear | Front |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1812 kg | 1487 kg |
| Vehicle Length | 4990 mm | 4730 mm |
| Vehicle Width | 1850 mm | 1820 mm |
| Vehicle Height | 1470 mm | 1420 mm |
| Wheelbase Size | 2960 mm | 2710 mm |
| Fuel Consumption Highway | 9.1 L/100km | 8.9 L/100km |
| Fuel Consumption City | 13.8 L/100km | 11.9 L/100km |
| Fuel Consumption Overall | 14.5 L/100km | 10.4 L/100km |
| Fuel Tank Capacity | 66 L | 65 L |
