2002 Alfa Romeo 156 vs. 2003 Pontiac Bonneville
To start off, 2003 Pontiac Bonneville is newer by 1 year(s). Which means there will be less support and parts availability for 2002 Alfa Romeo 156. In addition, the cost of maintenance, including insurance, on 2002 Alfa Romeo 156 would be higher. At 3,791 cc (6 cylinders), 2003 Pontiac Bonneville is equipped with a bigger engine. In terms of performance, 2003 Pontiac Bonneville (200 HP) has 52 more horse power than 2002 Alfa Romeo 156. (148 HP) In normal driving conditions, 2003 Pontiac Bonneville should accelerate faster than 2002 Alfa Romeo 156. With that said, vehicle weight also plays an important factor in acceleration. 2003 Pontiac Bonneville weights approximately 245 kg more than 2002 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, 2003 Pontiac Bonneville (311 Nm @ 4000 RPM) has 6 more torque (in Nm) than 2002 Alfa Romeo 156. (305 Nm @ 1800 RPM). This means 2003 Pontiac Bonneville will have an easier job in driving up hills or pulling heavy equipment than 2002 Alfa Romeo 156. 2003 Pontiac Bonneville has automatic transmission and 2002 Alfa Romeo 156 has manual transmission. 2002 Alfa Romeo 156 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2003 Pontiac Bonneville will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2002 Alfa Romeo 156 | 2003 Pontiac Bonneville | |
| Make | Alfa Romeo | Pontiac |
| Model | 156 | Bonneville |
| Year Released | 2002 | 2003 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2490 cc | 3791 cc |
| Engine Cylinders | 5 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Horse Power | 148 HP | 200 HP |
| Torque | 305 Nm | 311 Nm |
| Torque RPM | 1800 RPM | 4000 RPM |
| Engine Bore Size | 82 mm | 96.5 mm |
| Engine Stroke Size | 90.4 mm | 86.4 mm |
| Engine Compression Ratio | 18.5:1 | 9.4:1 |
| Fuel Type | Diesel | Gasoline |
| Drive Type | Front | Front |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1385 kg | 1630 kg |
| Vehicle Length | 4440 mm | 5110 mm |
| Vehicle Width | 1750 mm | 1890 mm |
| Vehicle Height | 1390 mm | 1440 mm |
| Wheelbase Size | 2610 mm | 2880 mm |
| Fuel Tank Capacity | 63 L | 68 L |
