2009 BMW Z4 vs. 2009 Fiat Siena
To start off, both 2009 BMW Z4 and 2009 Fiat Siena were released in the same year (2009). Therefore the support and the availability on parts for both vehicles should be relatively similar. At 2,996 cc (6 cylinders), 2009 BMW Z4 is equipped with a bigger engine. In terms of performance, 2009 BMW Z4 (335 HP @ 7900 RPM) has 235 more horse power than 2009 Fiat Siena. (100 HP @ 5500 RPM). In normal driving conditions, 2009 BMW Z4 should accelerate faster than 2009 Fiat Siena. With that said, vehicle weight also plays an important factor in acceleration. 2009 BMW Z4 weights approximately 236 kg more than 2009 Fiat Siena. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2009 BMW Z4 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 2009 BMW Z4. However, in wet, icy, snow, or gravel driving conditions, 2009 Fiat Siena, 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, 2009 BMW Z4 (315 Nm @ 2750 RPM) has 241 more torque (in Nm) than 2009 Fiat Siena. (74 Nm @ 5500 RPM). This means 2009 BMW Z4 will have an easier job in driving up hills or pulling heavy equipment than 2009 Fiat Siena. 2009 BMW Z4 has automatic transmission and 2009 Fiat Siena has manual transmission. 2009 Fiat Siena will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2009 BMW Z4 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2009 BMW Z4 | 2009 Fiat Siena | |
| Make | BMW | Fiat |
| Model | Z4 | Siena |
| Year Released | 2009 | 2009 |
| Body Type | Convertible | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2996 cc | 1581 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 335 HP | 100 HP |
| Engine RPM | 7900 RPM | 5500 RPM |
| Torque | 315 Nm | 74 Nm |
| Torque RPM | 2750 RPM | 5500 RPM |
| Engine Compression Ratio | 12.0:1 | 9.5:1 |
| Fuel Type | Gasoline | Gasoline |
| Top Speed | 244 km/hour | 184 km/hour |
| Acceleration 0-100mph | 6.2 seconds | 11.5 seconds |
| Drive Type | Rear | Front |
| Transmission Type | Automatic | Manual |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1310 kg | 1074 kg |
| Vehicle Length | 4100 mm | 3550 mm |
| Vehicle Width | 1790 mm | 1640 mm |
| Vehicle Height | 1310 mm | 1440 mm |
| Wheelbase Size | 2500 mm | 2380 mm |
| Fuel Consumption Overall | 9.7 L/100km | 8.2 L/100km |
| Fuel Tank Capacity | 55 L | 54 L |
