2007 Alfa Romeo 166 vs. 2009 Cadillac STS
To start off, 2009 Cadillac STS is newer by 2 year(s). Which means there will be less support and parts availability for 2007 Alfa Romeo 166. In addition, the cost of maintenance, including insurance, on 2007 Alfa Romeo 166 would be higher. At 3,599 cc (6 cylinders), 2009 Cadillac STS is equipped with a bigger engine. In terms of performance, 2009 Cadillac STS (302 HP @ 6300 RPM) has 124 more horse power than 2007 Alfa Romeo 166. (178 HP @ 4000 RPM) In normal driving conditions, 2009 Cadillac STS should accelerate faster than 2007 Alfa Romeo 166. With that said, vehicle weight also plays an important factor in acceleration. 2009 Cadillac STS weights approximately 20 kg more than 2007 Alfa Romeo 166. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2009 Cadillac STS 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 Cadillac STS. However, in wet, icy, snow, or gravel driving conditions, 2007 Alfa Romeo 166, 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, 2007 Alfa Romeo 166 (385 Nm @ 2000 RPM) has 16 more torque (in Nm) than 2009 Cadillac STS. (369 Nm @ 5200 RPM). This means 2007 Alfa Romeo 166 will have an easier job in driving up hills or pulling heavy equipment than 2009 Cadillac STS. 2009 Cadillac STS has automatic transmission and 2007 Alfa Romeo 166 has manual transmission. 2007 Alfa Romeo 166 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2009 Cadillac STS will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2007 Alfa Romeo 166 | 2009 Cadillac STS | |
| Make | Alfa Romeo | Cadillac |
| Model | 166 | STS |
| Year Released | 2007 | 2009 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2387 cc | 3599 cc |
| Engine Cylinders | 5 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 178 HP | 302 HP |
| Engine RPM | 4000 RPM | 6300 RPM |
| Torque | 385 Nm | 369 Nm |
| Torque RPM | 2000 RPM | 5200 RPM |
| Engine Compression Ratio | 18.5:1 | 11.3:1 |
| Fuel Type | Diesel | Gasoline |
| Drive Type | Front | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1615 kg | 1635 kg |
| Vehicle Length | 4730 mm | 5000 mm |
| Vehicle Width | 1810 mm | 1850 mm |
| Vehicle Height | 1420 mm | 1470 mm |
| Wheelbase Size | 2710 mm | 2960 mm |
| Fuel Consumption Overall | 7.5 L/100km | 11.8 L/100km |
| Fuel Tank Capacity | 69 L | 64 L |
