2007 BMW Z4 vs. 2006 Smart Roadster
To start off, 2007 BMW Z4 is newer by 1 year(s). Which means there will be less support and parts availability for 2006 Smart Roadster. In addition, the cost of maintenance, including insurance, on 2006 Smart Roadster would be higher. At 3,199 cc (6 cylinders), 2007 BMW Z4 is equipped with a bigger engine. In terms of performance, 2007 BMW Z4 (358 HP @ 7900 RPM) has 258 more horse power than 2006 Smart Roadster. (100 HP @ 5250 RPM). In normal driving conditions, 2007 BMW Z4 should accelerate faster than 2006 Smart Roadster.
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 BMW Z4 (385 Nm @ 4900 RPM) has 255 more torque (in Nm) than 2006 Smart Roadster. (130 Nm @ 2500 RPM). This means 2007 BMW Z4 will have an easier job in driving up hills or pulling heavy equipment than 2006 Smart Roadster.
Compare all specifications:
| 2007 BMW Z4 | 2006 Smart Roadster | |
| Make | BMW | Smart |
| Model | Z4 | Roadster |
| Year Released | 2007 | 2006 |
| Body Type | Convertible | Coupe |
| Engine Position | Front | Rear |
| Engine Size | 3199 cc | 696 cc |
| Engine Cylinders | 6 cylinders | 3 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 358 HP | 100 HP |
| Engine RPM | 7900 RPM | 5250 RPM |
| Torque | 385 Nm | 130 Nm |
| Torque RPM | 4900 RPM | 2500 RPM |
| Engine Compression Ratio | 11.5:1 | 9.0:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Top Speed | 273 km/hour | 195 km/hour |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 2 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Length | 4100 mm | 3430 mm |
| Vehicle Width | 1790 mm | 1620 mm |
| Vehicle Height | 1300 mm | 1200 mm |
| Wheelbase Size | 2500 mm | 2370 mm |
