2003 Mazda Roadster vs. 2007 Cadillac BLS
To start off, 2007 Cadillac BLS is newer by 4 year(s). Which means there will be less support and parts availability for 2003 Mazda Roadster. In addition, the cost of maintenance, including insurance, on 2003 Mazda Roadster would be higher. At 2,792 cc (6 cylinders), 2007 Cadillac BLS is equipped with a bigger engine. In terms of performance, 2007 Cadillac BLS (252 HP @ 5500 RPM) has 129 more horse power than 2003 Mazda Roadster. (123 HP @ 6500 RPM) In normal driving conditions, 2007 Cadillac BLS should accelerate faster than 2003 Mazda Roadster. With that said, vehicle weight also plays an important factor in acceleration. 2007 Cadillac BLS weights approximately 608 kg more than 2003 Mazda Roadster. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2003 Mazda Roadster 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 2003 Mazda Roadster. However, in wet, icy, snow, or gravel driving conditions, 2007 Cadillac BLS, 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 BLS (365 Nm @ 1800 RPM) has 223 more torque (in Nm) than 2003 Mazda Roadster. (142 Nm @ 5000 RPM). This means 2007 Cadillac BLS will have an easier job in driving up hills or pulling heavy equipment than 2003 Mazda Roadster. 2007 Cadillac BLS has automatic transmission and 2003 Mazda Roadster has manual transmission. 2003 Mazda Roadster will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2007 Cadillac BLS will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2003 Mazda Roadster | 2007 Cadillac BLS | |
| Make | Mazda | Cadillac |
| Model | Roadster | BLS |
| Year Released | 2003 | 2007 |
| Body Type | Convertible | Sedan |
| Engine Position | Front | Front |
| Engine Size | 1598 cc | 2792 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Horse Power | 123 HP | 252 HP |
| Engine RPM | 6500 RPM | 5500 RPM |
| Torque | 142 Nm | 365 Nm |
| Torque RPM | 5000 RPM | 1800 RPM |
| Engine Bore Size | 78 mm | 89 mm |
| Engine Stroke Size | 83.6 mm | 74.8 mm |
| Engine Compression Ratio | 9.4:1 | 9.5:1 |
| Drive Type | Rear | Front |
| Transmission Type | Manual | Automatic |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1030 kg | 1638 kg |
| Vehicle Length | 3960 mm | 4690 mm |
| Vehicle Width | 1690 mm | 1760 mm |
| Vehicle Height | 1240 mm | 1480 mm |
| Wheelbase Size | 2270 mm | 2680 mm |
| Fuel Tank Capacity | 48 L | 58 L |
