2003 BMW Z4 vs. 2008 Cadillac STS
To start off, 2008 Cadillac STS is newer by 5 year(s). Which means there will be less support and parts availability for 2003 BMW Z4. In addition, the cost of maintenance, including insurance, on 2003 BMW Z4 would be higher. At 3,600 cc (6 cylinders), 2008 Cadillac STS is equipped with a bigger engine. In terms of performance, 2008 Cadillac STS (302 HP @ 6300 RPM) has 75 more horse power than 2003 BMW Z4. (227 HP @ 6000 RPM) In normal driving conditions, 2008 Cadillac STS should accelerate faster than 2003 BMW Z4. With that said, vehicle weight also plays an important factor in acceleration. 2008 Cadillac STS weights approximately 270 kg more than 2003 BMW Z4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2008 Cadillac STS is four wheel drive (4WD), it will have significant more traction and grip than 2003 BMW Z4. In wet, icy, snow, or gravel driving conditions, 2008 Cadillac STS 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, 2008 Cadillac STS (369 Nm @ 5200 RPM) has 78 more torque (in Nm) than 2003 BMW Z4. (291 Nm @ 3500 RPM). This means 2008 Cadillac STS will have an easier job in driving up hills or pulling heavy equipment than 2003 BMW Z4. 2008 Cadillac STS has automatic transmission and 2003 BMW Z4 has manual transmission. 2003 BMW Z4 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2008 Cadillac STS will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2003 BMW Z4 | 2008 Cadillac STS | |
| Make | BMW | Cadillac |
| Model | Z4 | STS |
| Year Released | 2003 | 2008 |
| Body Type | Convertible | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2999 cc | 3600 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 227 HP | 302 HP |
| Engine RPM | 6000 RPM | 6300 RPM |
| Torque | 291 Nm | 369 Nm |
| Torque RPM | 3500 RPM | 5200 RPM |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | 4WD |
| Transmission Type | Manual | Automatic |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1290 kg | 1560 kg |
| Vehicle Length | 4100 mm | 5000 mm |
| Vehicle Width | 1790 mm | 1850 mm |
| Vehicle Height | 1310 mm | 1470 mm |
| Wheelbase Size | 2500 mm | 2960 mm |
| Fuel Tank Capacity | 55 L | 64 L |
