2006 Alfa Romeo 156 vs. 2011 BMW Z4
To start off, 2011 BMW Z4 is newer by 5 year(s). Which means there will be less support and parts availability for 2006 Alfa Romeo 156. In addition, the cost of maintenance, including insurance, on 2006 Alfa Romeo 156 would be higher. At 2,387 cc (5 cylinders), 2006 Alfa Romeo 156 is equipped with a bigger engine. In terms of performance, 2011 BMW Z4 (182 HP @ 5000 RPM) has 9 more horse power than 2006 Alfa Romeo 156. (173 HP @ 4000 RPM) In normal driving conditions, 2011 BMW Z4 should accelerate faster than 2006 Alfa Romeo 156. With that said, vehicle weight also plays an important factor in acceleration. 2006 Alfa Romeo 156 weights approximately 30 kg more than 2011 BMW Z4.
Because 2011 BMW Z4 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 2011 BMW Z4. However, in wet, icy, snow, or gravel driving conditions, 2006 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, 2006 Alfa Romeo 156 (385 Nm @ 2000 RPM) has 115 more torque (in Nm) than 2011 BMW Z4. (270 Nm @ 1250 RPM). This means 2006 Alfa Romeo 156 will have an easier job in driving up hills or pulling heavy equipment than 2011 BMW Z4.
Compare all specifications:
| 2006 Alfa Romeo 156 | 2011 BMW Z4 | |
| Make | Alfa Romeo | BMW |
| Model | 156 | Z4 |
| Year Released | 2006 | 2011 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Front |
| Engine Size | 2387 cc | 1997 cc |
| Engine Cylinders | 5 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 173 HP | 182 HP |
| Engine RPM | 4000 RPM | 5000 RPM |
| Torque | 385 Nm | 270 Nm |
| Torque RPM | 2000 RPM | 1250 RPM |
| Engine Bore Size | 82 mm | 90.1 mm |
| Engine Stroke Size | 90.4 mm | 84 mm |
| Fuel Type | Diesel | Gasoline |
| Top Speed | 225 km/hour | 235 km/hour |
| Acceleration 0-100mph | 9.7 seconds | 6.9 seconds |
| Drive Type | Front | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1510 kg | 1480 kg |
| Vehicle Length | 4440 mm | 4239 mm |
| Vehicle Width | 1750 mm | 1791 mm |
| Vehicle Height | 1440 mm | 1290 mm |
| Wheelbase Size | 2550 mm | 2497 mm |
| Fuel Consumption Overall | 6.6 L/100km | 6.8 L/100km |
| Fuel Tank Capacity | 63 L | 55 L |
