2005 Alfa Romeo 166 vs. 2007 Cadillac STS
To start off, 2007 Cadillac STS is newer by 2 year(s). Which means there will be less support and parts availability for 2005 Alfa Romeo 166. In addition, the cost of maintenance, including insurance, on 2005 Alfa Romeo 166 would be higher. At 4,565 cc (8 cylinders), 2007 Cadillac STS is equipped with a bigger engine. In terms of performance, 2007 Cadillac STS (320 HP @ 6400 RPM) has 83 more horse power than 2005 Alfa Romeo 166. (237 HP @ 6200 RPM) In normal driving conditions, 2007 Cadillac STS should accelerate faster than 2005 Alfa Romeo 166. With that said, vehicle weight also plays an important factor in acceleration. 2007 Cadillac STS weights approximately 23 kg more than 2005 Alfa Romeo 166. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2007 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 2007 Cadillac STS. However, in wet, icy, snow, or gravel driving conditions, 2005 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 Cadillac STS (427 Nm @ 4400 RPM) has 138 more torque (in Nm) than 2005 Alfa Romeo 166. (289 Nm @ 4800 RPM). This means 2007 Cadillac STS will have an easier job in driving up hills or pulling heavy equipment than 2005 Alfa Romeo 166.
Compare all specifications:
| 2005 Alfa Romeo 166 | 2007 Cadillac STS | |
| Make | Alfa Romeo | Cadillac |
| Model | 166 | STS |
| Year Released | 2005 | 2007 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 3179 cc | 4565 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 237 HP | 320 HP |
| Engine RPM | 6200 RPM | 6400 RPM |
| Torque | 289 Nm | 427 Nm |
| Torque RPM | 4800 RPM | 4400 RPM |
| Engine Bore Size | 93 mm | 93 mm |
| Engine Stroke Size | 78 mm | 84 mm |
| Engine Compression Ratio | 10.0:1 | 10.5:1 |
| Drive Type | Front | Rear |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1615 kg | 1638 kg |
| Vehicle Length | 4730 mm | 4990 mm |
| Vehicle Width | 1810 mm | 1850 mm |
| Vehicle Height | 1420 mm | 1470 mm |
| Wheelbase Size | 2710 mm | 2960 mm |
| Fuel Consumption Overall | 12.5 L/100km | 11.8 L/100km |
| Fuel Tank Capacity | 72 L | 64 L |
