2007 Cadillac STS vs. 2009 Kia Optima
To start off, 2009 Kia Optima is newer by 2 year(s). Which means there will be less support and parts availability for 2007 Cadillac STS. In addition, the cost of maintenance, including insurance, on 2007 Cadillac STS would be higher. At 4,565 cc (8 cylinders), 2007 Cadillac STS is equipped with a bigger engine. In terms of performance, 2007 Cadillac STS (320 HP @ 6400 RPM) has 126 more horse power than 2009 Kia Optima. (194 HP @ 6000 RPM). In normal driving conditions, 2007 Cadillac STS should accelerate faster than 2009 Kia Optima. With that said, vehicle weight also plays an important factor in acceleration. 2007 Cadillac STS weights approximately 47 kg more than 2009 Kia Optima. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2007 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 2007 Cadillac STS. However, in wet, icy, snow, or gravel driving conditions, 2009 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, 2007 Cadillac STS (427 Nm @ 4400 RPM) has 177 more torque (in Nm) than 2009 Kia Optima. (250 Nm @ 4500 RPM). This means 2007 Cadillac STS will have an easier job in driving up hills or pulling heavy equipment than 2009 Kia Optima.
Compare all specifications:
| 2007 Cadillac STS | 2009 Kia Optima | |
| Make | Cadillac | Kia |
| Model | STS | Optima |
| Year Released | 2007 | 2009 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4565 cc | 2656 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 320 HP | 194 HP |
| Engine RPM | 6400 RPM | 6000 RPM |
| Torque | 427 Nm | 250 Nm |
| Torque RPM | 4400 RPM | 4500 RPM |
| Engine Bore Size | 93 mm | 86.7 mm |
| Engine Stroke Size | 84 mm | 75 mm |
| Engine Compression Ratio | 10.5:1 | 10.4:1 |
| Drive Type | Rear | Front |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1566 kg | 1519 kg |
| Vehicle Length | 4990 mm | 4810 mm |
| Vehicle Width | 1850 mm | 1810 mm |
| Vehicle Height | 1470 mm | 1490 mm |
| Wheelbase Size | 2960 mm | 2730 mm |
| Fuel Consumption Highway | 8.7 L/100km | 8.6 L/100km |
| Fuel Consumption City | 13.8 L/100km | 11.9 L/100km |
| Fuel Consumption Overall | 11.8 L/100km | 10.4 L/100km |
| Fuel Tank Capacity | 64 L | 62 L |
