2006 BMW Z4 vs. 2006 Smart Roadster
To start off, both 2006 BMW Z4 and 2006 Smart Roadster were released in the same year (2006). Therefore the support and the availability on parts for both vehicles should be relatively similar. At 2,979 cc (6 cylinders), 2006 BMW Z4 is equipped with a bigger engine. In terms of performance, 2006 BMW Z4 (229 HP @ 5900 RPM) has 148 more horse power than 2006 Smart Roadster. (81 HP @ 5250 RPM). In normal driving conditions, 2006 BMW Z4 should accelerate faster than 2006 Smart Roadster. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW Z4 weights approximately 745 kg more than 2006 Smart Roadster. 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, 2006 BMW Z4 (300 Nm @ 3500 RPM) has 190 more torque (in Nm) than 2006 Smart Roadster. (110 Nm @ 3000 RPM). This means 2006 BMW Z4 will have an easier job in driving up hills or pulling heavy equipment than 2006 Smart Roadster. 2006 Smart Roadster has automatic transmission and 2006 BMW Z4 has manual transmission. 2006 BMW Z4 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2006 Smart Roadster will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2006 BMW Z4 | 2006 Smart Roadster | |
| Make | BMW | Smart |
| Model | Z4 | Roadster |
| Year Released | 2006 | 2006 |
| Body Type | Convertible | Coupe |
| Engine Position | Front | Rear |
| Engine Size | 2979 cc | 698 cc |
| Engine Cylinders | 6 cylinders | 3 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 229 HP | 81 HP |
| Engine RPM | 5900 RPM | 5250 RPM |
| Torque | 300 Nm | 110 Nm |
| Torque RPM | 3500 RPM | 3000 RPM |
| Engine Bore Size | 84 mm | 66.5 mm |
| Engine Stroke Size | 90 mm | 67 mm |
| Engine Compression Ratio | 10.2:1 | 9.0:1 |
| Fuel Type | Gasoline | Gasoline |
| Top Speed | 250 km/hour | 175 km/hour |
| Acceleration 0-100mph | 5.9 seconds | 10.9 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 2 seats | 2 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1630 kg | 885 kg |
| Vehicle Length | 4570 mm | 3430 mm |
| Vehicle Width | 1790 mm | 1620 mm |
| Vehicle Height | 1680 mm | 1200 mm |
| Wheelbase Size | 2500 mm | 2370 mm |
| Fuel Consumption Overall | 9.1 L/100km | 5.1 L/100km |
| Fuel Tank Capacity | 55 L | 35 L |
