2009 BMW Z4 vs. 2007 Cadillac STS
To start off, 2009 BMW Z4 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, 2009 BMW Z4 (338 HP @ 7900 RPM) has 16 more horse power than 2007 Cadillac STS. (322 HP @ 6400 RPM). In normal driving conditions, 2009 BMW Z4 should accelerate faster than 2007 Cadillac STS. With that said, vehicle weight also plays an important factor in acceleration. 2007 Cadillac STS weights approximately 325 kg more than 2009 BMW Z4.
Because 2007 Cadillac STS is four wheel drive (4WD), it will have significant more traction and grip than 2009 BMW Z4. In wet, icy, snow, or gravel driving conditions, 2007 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, 2007 Cadillac STS (427 Nm @ 4400 RPM) has 62 more torque (in Nm) than 2009 BMW Z4. (365 Nm @ 4900 RPM). This means 2007 Cadillac STS will have an easier job in driving up hills or pulling heavy equipment than 2009 BMW Z4. 2007 Cadillac STS has automatic transmission and 2009 BMW Z4 has manual transmission. 2009 BMW Z4 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:
| 2009 BMW Z4 | 2007 Cadillac STS | |
| Make | BMW | Cadillac |
| Model | Z4 | STS |
| Year Released | 2009 | 2007 |
| Body Type | Coupe | Sedan |
| Engine Position | Front | Front |
| Engine Size | 3244 cc | 4565 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 338 HP | 322 HP |
| Engine RPM | 7900 RPM | 6400 RPM |
| Torque | 365 Nm | 427 Nm |
| Torque RPM | 4900 RPM | 4400 RPM |
| Engine Bore Size | 87 mm | 93 mm |
| Engine Stroke Size | 91 mm | 84 mm |
| Engine Compression Ratio | 11.5:1 | 10.5:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Top Speed | 250 km/hour | 250 km/hour |
| Acceleration 0-100mph | 5 seconds | 6.2 seconds |
| Drive Type | Rear | 4WD |
| Transmission Type | Manual | Automatic |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1495 kg | 1820 kg |
| Vehicle Length | 4120 mm | 4990 mm |
| Vehicle Width | 1790 mm | 1850 mm |
| Vehicle Height | 1290 mm | 1470 mm |
| Wheelbase Size | 2500 mm | 2960 mm |
| Fuel Consumption Overall | 12.1 L/100km | 11.8 L/100km |
| Fuel Tank Capacity | 60 L | 66 L |
