2003 Alfa Romeo 166 vs. 2007 Alfa Romeo 156
To start off, 2007 Alfa Romeo 156 is newer by 4 year(s). Which means there will be less support and parts availability for 2003 Alfa Romeo 166. In addition, the cost of maintenance, including insurance, on 2003 Alfa Romeo 166 would be higher. At 3,177 cc (6 cylinders), 2003 Alfa Romeo 166 is equipped with a bigger engine. In terms of performance, 2003 Alfa Romeo 166 (247 HP @ 6200 RPM) has 58 more horse power than 2007 Alfa Romeo 156. (189 HP @ 6300 RPM). In normal driving conditions, 2003 Alfa Romeo 166 should accelerate faster than 2007 Alfa Romeo 156. With that said, vehicle weight also plays an important factor in acceleration. 2003 Alfa Romeo 166 weights approximately 184 kg more than 2007 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 Alfa Romeo 166 (289 Nm @ 4800 RPM) has 71 more torque (in Nm) than 2007 Alfa Romeo 156. (218 Nm @ 5000 RPM). This means 2003 Alfa Romeo 166 will have an easier job in driving up hills or pulling heavy equipment than 2007 Alfa Romeo 156.
Compare all specifications:
| 2003 Alfa Romeo 166 | 2007 Alfa Romeo 156 | |
| Make | Alfa Romeo | Alfa Romeo |
| Model | 166 | 156 |
| Year Released | 2003 | 2007 |
| Body Type | Sedan | Sedan |
| Engine Position | Front | Front |
| Engine Size | 3177 cc | 2492 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 247 HP | 189 HP |
| Engine RPM | 6200 RPM | 6300 RPM |
| Torque | 289 Nm | 218 Nm |
| Torque RPM | 4800 RPM | 5000 RPM |
| Engine Bore Size | 93 mm | 88 mm |
| Engine Stroke Size | 78 mm | 68.3 mm |
| Engine Compression Ratio | 10.5:1 | 10.3:1 |
| Top Speed | 245 km/hour | 230 km/hour |
| Acceleration 0-100mph | 7.4 seconds | 7.3 seconds |
| Drive Type | Front | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1540 kg | 1356 kg |
| Vehicle Length | 4730 mm | 4440 mm |
| Vehicle Width | 1810 mm | 1750 mm |
| Vehicle Height | 1420 mm | 1440 mm |
| Wheelbase Size | 2550 mm | 2600 mm |
| Fuel Consumption Overall | 12.5 L/100km | 11.8 L/100km |
| Fuel Tank Capacity | 69 L | 63 L |
