2007 Cadillac STS vs. 2008 Alfa Romeo 156
To start off, 2008 Alfa Romeo 156 is newer by 1 year(s). Which means there will be less support and parts availability for 2007 Cadillac STS. In addition, the cost of maintenance, including insurance, on 2007 Cadillac STS 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 (321 HP @ 6400 RPM) has 173 more horse power than 2008 Alfa Romeo 156. (148 HP @ 6300 RPM). In normal driving conditions, 2007 Cadillac STS should accelerate faster than 2008 Alfa Romeo 156. With that said, vehicle weight also plays an important factor in acceleration. 2007 Cadillac STS weights approximately 350 kg more than 2008 Alfa Romeo 156. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Both vehicles are front wheel drive (FWD). Which offers better traction when its slippery than rear wheel drive vehicles. 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 245 more torque (in Nm) than 2008 Alfa Romeo 156. (182 Nm @ 3800 RPM). This means 2007 Cadillac STS will have an easier job in driving up hills or pulling heavy equipment than 2008 Alfa Romeo 156. 2007 Cadillac STS has automatic transmission and 2008 Alfa Romeo 156 has manual transmission. 2008 Alfa Romeo 156 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2007 Cadillac STS will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2007 Cadillac STS | 2008 Alfa Romeo 156 | |
| Make | Cadillac | Alfa Romeo |
| Model | STS | 156 |
| Year Released | 2007 | 2008 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4565 cc | 1970 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 321 HP | 148 HP |
| Engine RPM | 6400 RPM | 6300 RPM |
| Torque | 427 Nm | 182 Nm |
| Torque RPM | 4400 RPM | 3800 RPM |
| Engine Bore Size | 93 mm | 83 mm |
| Engine Stroke Size | 84 mm | 91 mm |
| Drive Type | Front | Front |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1635 kg | 1285 kg |
| Vehicle Length | 4990 mm | 4440 mm |
| Vehicle Width | 1850 mm | 1750 mm |
| Vehicle Height | 1470 mm | 1440 mm |
| Wheelbase Size | 2960 mm | 2600 mm |
| Fuel Consumption Overall | 11.8 L/100km | 8.7 L/100km |
| Fuel Tank Capacity | 64 L | 63 L |
