1991 Porsche 911 vs. 2007 BMW Z4
To start off, 2007 BMW Z4 is newer by 16 year(s). Which means there will be less support and parts availability for 1991 Porsche 911. In addition, the cost of maintenance, including insurance, on 1991 Porsche 911 would be higher. At 3,163 cc (6 cylinders), 1991 Porsche 911 is equipped with a bigger engine. In terms of performance, 1991 Porsche 911 (228 HP @ 5900 RPM) has 39 more horse power than 2007 BMW Z4. (189 HP @ 6000 RPM). In normal driving conditions, 1991 Porsche 911 should accelerate faster than 2007 BMW Z4. With that said, vehicle weight also plays an important factor in acceleration. 2007 BMW Z4 weights approximately 160 kg more than 1991 Porsche 911.
Let's talk about torque, 1991 Porsche 911 (286 Nm @ 4800 RPM) has 41 more torque (in Nm) than 2007 BMW Z4. (245 Nm @ 3500 RPM). This means 1991 Porsche 911 will have an easier job in driving up hills or pulling heavy equipment than 2007 BMW Z4.
Compare all specifications:
| 1991 Porsche 911 | 2007 BMW Z4 | |
| Make | Porsche | BMW |
| Model | 911 | Z4 |
| Year Released | 1991 | 2007 |
| Body Type | Roadster | Convertible |
| Engine Position | Rear | Front |
| Engine Size | 3163 cc | 2492 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | boxer | in-line |
| Horse Power | 228 HP | 189 HP |
| Engine RPM | 5900 RPM | 6000 RPM |
| Torque | 286 Nm | 245 Nm |
| Torque RPM | 4800 RPM | 3500 RPM |
| Fuel Type | Gasoline | Gasoline - Premium |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1175 kg | 1335 kg |
| Vehicle Length | 4300 mm | 4100 mm |
| Vehicle Width | 1660 mm | 1790 mm |
| Vehicle Height | 1260 mm | 1310 mm |
