2003 Alfa Romeo 156 vs. 2004 Pontiac Bonneville
To start off, 2004 Pontiac Bonneville is newer by 1 year(s). Which means there will be less support and parts availability for 2003 Alfa Romeo 156. In addition, the cost of maintenance, including insurance, on 2003 Alfa Romeo 156 would be higher. At 4,556 cc (8 cylinders), 2004 Pontiac Bonneville is equipped with a bigger engine. In terms of performance, 2004 Pontiac Bonneville (275 HP @ 5200 RPM) has 137 more horse power than 2003 Alfa Romeo 156. (138 HP @ 4000 RPM) In normal driving conditions, 2004 Pontiac Bonneville should accelerate faster than 2003 Alfa Romeo 156. With that said, vehicle weight also plays an important factor in acceleration. 2004 Pontiac Bonneville weights approximately 289 kg more than 2003 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, 2004 Pontiac Bonneville (407 Nm) has 101 more torque (in Nm) than 2003 Alfa Romeo 156. (306 Nm). This means 2004 Pontiac Bonneville will have an easier job in driving up hills or pulling heavy equipment than 2003 Alfa Romeo 156. 2004 Pontiac Bonneville has automatic transmission and 2003 Alfa Romeo 156 has manual transmission. 2003 Alfa Romeo 156 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2004 Pontiac Bonneville will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2003 Alfa Romeo 156 | 2004 Pontiac Bonneville | |
| Make | Alfa Romeo | Pontiac |
| Model | 156 | Bonneville |
| Year Released | 2003 | 2004 |
| Body Type | Station Wagon | Sedan |
| Engine Position | Front | Front |
| Engine Size | 1970 cc | 4556 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 138 HP | 275 HP |
| Engine RPM | 4000 RPM | 5200 RPM |
| Torque | 306 Nm | 407 Nm |
| Engine Bore Size | 82 mm | 93 mm |
| Engine Stroke Size | 90.4 mm | 84 mm |
| Drive Type | Front | Front |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 1430 kg | 1719 kg |
| Vehicle Length | 4450 mm | 5150 mm |
| Vehicle Width | 1750 mm | 1890 mm |
| Vehicle Height | 1400 mm | 1440 mm |
| Wheelbase Size | 2550 mm | 2810 mm |
| Fuel Consumption Overall | 6.1 L/100km | 12.5 L/100km |
| Fuel Tank Capacity | 63 L | 70 L |
