2007 Cadillac STS vs. 2005 Mazda RX-8
To start off, 2007 Cadillac STS is newer by 2 year(s). Which means there will be less support and parts availability for 2005 Mazda RX-8. In addition, the cost of maintenance, including insurance, on 2005 Mazda RX-8 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 131 more horse power than 2005 Mazda RX-8. (189 HP @ 7000 RPM). In normal driving conditions, 2007 Cadillac STS should accelerate faster than 2005 Mazda RX-8. With that said, vehicle weight also plays an important factor in acceleration. 2007 Cadillac STS weights approximately 282 kg more than 2005 Mazda RX-8. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Both vehicles are rear wheel drive (RWD) - it offers better handling in dry conditions; in addition, if you are looking to drift, both vehicles do the job better than front wheel drive vehicles. 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 207 more torque (in Nm) than 2005 Mazda RX-8. (220 Nm @ 5000 RPM). This means 2007 Cadillac STS will have an easier job in driving up hills or pulling heavy equipment than 2005 Mazda RX-8. 2007 Cadillac STS has automatic transmission and 2005 Mazda RX-8 has manual transmission. 2005 Mazda RX-8 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2007 Cadillac STS will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2007 Cadillac STS | 2005 Mazda RX-8 | |
| Make | Cadillac | Mazda |
| Model | STS | RX-8 |
| Year Released | 2007 | 2005 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Front |
| Engine Size | 4565 cc | 1308 cc |
| Engine Type | V | dual-disk rotary |
| Horse Power | 320 HP | 189 HP |
| Engine RPM | 6400 RPM | 7000 RPM |
| Torque | 427 Nm | 220 Nm |
| Torque RPM | 4400 RPM | 5000 RPM |
| Engine Compression Ratio | 10.5:1 | 10.0:1 |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1638 kg | 1356 kg |
| Vehicle Length | 4990 mm | 4440 mm |
| Vehicle Width | 1850 mm | 1780 mm |
| Vehicle Height | 1470 mm | 1350 mm |
| Wheelbase Size | 2960 mm | 2710 mm |
| Fuel Consumption Overall | 11.8 L/100km | 10.8 L/100km |
| Fuel Tank Capacity | 64 L | 61 L |
