2008 Fiat Siena vs. 2006 Smart Roadster
To start off, 2008 Fiat Siena is newer by 2 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 1,581 cc (4 cylinders), 2008 Fiat Siena is equipped with a bigger engine. In terms of performance, 2008 Fiat Siena (106 HP @ 5500 RPM) has 25 more horse power than 2006 Smart Roadster. (81 HP @ 5250 RPM). In normal driving conditions, 2008 Fiat Siena should accelerate faster than 2006 Smart Roadster. With that said, vehicle weight also plays an important factor in acceleration. 2008 Fiat Siena weights approximately 230 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.
Because 2006 Smart Roadster 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 2006 Smart Roadster. However, in wet, icy, snow, or gravel driving conditions, 2008 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, 2008 Fiat Siena (140 Nm @ 4000 RPM) has 30 more torque (in Nm) than 2006 Smart Roadster. (110 Nm @ 3000 RPM). This means 2008 Fiat Siena will have an easier job in driving up hills or pulling heavy equipment than 2006 Smart Roadster. 2006 Smart Roadster has automatic transmission and 2008 Fiat Siena has manual transmission. 2008 Fiat Siena 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:
| 2008 Fiat Siena | 2006 Smart Roadster | |
| Make | Fiat | Smart |
| Model | Siena | Roadster |
| Year Released | 2008 | 2006 |
| Body Type | Sedan | Roadster |
| Engine Position | Front | Rear |
| Engine Size | 1581 cc | 698 cc |
| Engine Cylinders | 4 cylinders | 3 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 106 HP | 81 HP |
| Engine RPM | 5500 RPM | 5250 RPM |
| Torque | 140 Nm | 110 Nm |
| Torque RPM | 4000 RPM | 3000 RPM |
| Engine Bore Size | 86.5 mm | 66.5 mm |
| Engine Stroke Size | 67.4 mm | 67 mm |
| Engine Compression Ratio | 10.2:1 | 9.0:1 |
| Fuel Type | Gasoline | Gasoline |
| Acceleration 0-100mph | 10.5 seconds | 10.9 seconds |
| Drive Type | Front | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1095 kg | 865 kg |
| Vehicle Length | 3550 mm | 3430 mm |
| Vehicle Width | 1640 mm | 1620 mm |
| Vehicle Height | 1490 mm | 1200 mm |
| Wheelbase Size | 2370 mm | 2370 mm |
| Fuel Consumption Overall | 8.2 L/100km | 5.1 L/100km |
| Fuel Tank Capacity | 47 L | 35 L |
