2007 Fiat Siena vs. 2012 BMW 650
To start off, 2012 BMW 650 is newer by 5 year(s). Which means there will be less support and parts availability for 2007 Fiat Siena. In addition, the cost of maintenance, including insurance, on 2007 Fiat Siena would be higher. At 4,400 cc (8 cylinders), 2012 BMW 650 is equipped with a bigger engine. In terms of performance, 2012 BMW 650 (400 HP @ 5500 RPM) has 300 more horse power than 2007 Fiat Siena. (100 HP @ 5500 RPM) In normal driving conditions, 2012 BMW 650 should accelerate faster than 2007 Fiat Siena. With that said, vehicle weight also plays an important factor in acceleration. 2012 BMW 650 weights approximately 1020 kg more than 2007 Fiat Siena. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2012 BMW 650 is all wheel drive (AWD), it will have significant more traction and grip than 2007 Fiat Siena. In wet, icy, snow, or gravel driving conditions, 2012 BMW 650 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, 2012 BMW 650 (609 Nm @ 1750 RPM) has 469 more torque (in Nm) than 2007 Fiat Siena. (140 Nm @ 4000 RPM). This means 2012 BMW 650 will have an easier job in driving up hills or pulling heavy equipment than 2007 Fiat Siena. 2012 BMW 650 has automatic transmission and 2007 Fiat Siena has manual transmission. 2007 Fiat Siena will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2012 BMW 650 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2007 Fiat Siena | 2012 BMW 650 | |
| Make | Fiat | BMW |
| Model | Siena | 650 |
| Year Released | 2007 | 2012 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Front |
| Engine Size | 1581 cc | 4400 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 100 HP | 400 HP |
| Engine RPM | 5500 RPM | 5500 RPM |
| Torque | 140 Nm | 609 Nm |
| Torque RPM | 4000 RPM | 1750 RPM |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Front | AWD |
| Transmission Type | Manual | 8-speed shiftable automatic |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1070 kg | 2090 kg |
| Vehicle Width | 1640 mm | 1894 mm |
| Wheelbase Size | 2380 mm | 2855 mm |
| Fuel Tank Capacity | 54 L | 70 L |
