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 3,000 cc (6 cylinders), 2011 BMW Z4 is equipped with a bigger engine. In terms of performance, 2011 BMW Z4 (335 HP @ 5900 RPM) has 221 more horse power than 2006 Alfa Romeo 156. (114 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. 2011 BMW Z4 weights approximately 302 kg more than 2006 Alfa Romeo 156. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
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, 2011 BMW Z4 (450 Nm @ 1500 RPM) has 175 more torque (in Nm) than 2006 Alfa Romeo 156. (275 Nm @ 2000 RPM). This means 2011 BMW Z4 will have an easier job in driving up hills or pulling heavy equipment than 2006 Alfa Romeo 156. 2011 BMW Z4 has automatic transmission and 2006 Alfa Romeo 156 has manual transmission. 2006 Alfa Romeo 156 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2011 BMW Z4 will be easier to drive especially in heavy traffic.
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 | 1910 cc | 3000 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 114 HP | 335 HP |
| Engine RPM | 4000 RPM | 5900 RPM |
| Torque | 275 Nm | 450 Nm |
| Torque RPM | 2000 RPM | 1500 RPM |
| Fuel Type | Diesel | Gasoline |
| Drive Type | Front | Rear |
| Transmission Type | Manual | 7-speed automated manual |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1308 kg | 1610 kg |
| Vehicle Length | 4440 mm | 4242 mm |
| Vehicle Width | 1750 mm | 1791 mm |
| Vehicle Height | 1440 mm | 1285 mm |
| Wheelbase Size | 2600 mm | 2497 mm |
| Fuel Consumption | 4.7 L/100km | 9.8 L/100km |
| Fuel Consumption City | 7.8 L/100km | 13.8 L/100km |
| Fuel Tank Capacity | 63 L | 55 L |
