2004 Alfa Romeo 156 vs. 2003 Pontiac Bonneville
To start off, 2004 Alfa Romeo 156 is newer by 1 year(s). Which means there will be less support and parts availability for 2003 Pontiac Bonneville. In addition, the cost of maintenance, including insurance, on 2003 Pontiac Bonneville 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 2004 Alfa Romeo 156. (148 HP) In normal driving conditions, 2003 Pontiac Bonneville should accelerate faster than 2004 Alfa Romeo 156. With that said, vehicle weight also plays an important factor in acceleration. 2003 Pontiac Bonneville weights approximately 105 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 2004 Alfa Romeo 156 is four wheel drive (4WD), it will have significant more traction and grip than 2003 Pontiac Bonneville. In wet, icy, snow, or gravel driving conditions, 2004 Alfa Romeo 156 will offer significantly more control. 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 11 more torque (in Nm) than 2004 Alfa Romeo 156. (300 Nm @ 2000 RPM). This means 2003 Pontiac Bonneville will have an easier job in driving up hills or pulling heavy equipment than 2004 Alfa Romeo 156. 2003 Pontiac Bonneville 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. 2003 Pontiac Bonneville will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2004 Alfa Romeo 156 | 2003 Pontiac Bonneville | |
| Make | Alfa Romeo | Pontiac |
| Model | 156 | Bonneville |
| Year Released | 2004 | 2003 |
| Body Type | Station Wagon | Sedan |
| Engine Position | Front | Front |
| Engine Size | 1910 cc | 3791 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 148 HP | 200 HP |
| Torque | 300 Nm | 311 Nm |
| Torque RPM | 2000 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 | 4WD | Front |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 1525 kg | 1630 kg |
| Vehicle Width | 1750 mm | 1890 mm |
| Vehicle Height | 1460 mm | 1440 mm |
| Wheelbase Size | 2600 mm | 2880 mm |
| Fuel Tank Capacity | 63 L | 68 L |
