2004 Alfa Romeo 156 vs. 2007 Cadillac STS
To start off, 2007 Cadillac STS is newer by 3 year(s). Which means there will be less support and parts availability for 2004 Alfa Romeo 156. In addition, the cost of maintenance, including insurance, on 2004 Alfa Romeo 156 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 147 more horse power than 2004 Alfa Romeo 156. (173 HP @ 4000 RPM) In normal driving conditions, 2007 Cadillac STS should accelerate faster than 2004 Alfa Romeo 156. With that said, vehicle weight also plays an important factor in acceleration. 2007 Cadillac STS weights approximately 56 kg more than 2004 Alfa Romeo 156. 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, 2004 Alfa Romeo 156, 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 42 more torque (in Nm) than 2004 Alfa Romeo 156. (385 Nm @ 2000 RPM). This means 2007 Cadillac STS will have an easier job in driving up hills or pulling heavy equipment than 2004 Alfa Romeo 156. 2007 Cadillac STS has automatic transmission and 2004 Alfa Romeo 156 has manual transmission. 2004 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:
| 2004 Alfa Romeo 156 | 2007 Cadillac STS | |
| Make | Alfa Romeo | Cadillac |
| Model | 156 | STS |
| Year Released | 2004 | 2007 |
| Body Type | Station Wagon | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2387 cc | 4565 cc |
| Engine Cylinders | 5 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 173 HP | 320 HP |
| Engine RPM | 4000 RPM | 6400 RPM |
| Torque | 385 Nm | 427 Nm |
| Torque RPM | 2000 RPM | 4400 RPM |
| Engine Compression Ratio | 18.5:1 | 10.5:1 |
| Drive Type | Front | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 1510 kg | 1566 kg |
| Vehicle Length | 4450 mm | 4990 mm |
| Vehicle Width | 1750 mm | 1850 mm |
| Vehicle Height | 1400 mm | 1470 mm |
| Wheelbase Size | 2550 mm | 2960 mm |
| Fuel Consumption Overall | 6.8 L/100km | 11.8 L/100km |
| Fuel Tank Capacity | 63 L | 64 L |
