1991 BMW M12 vs. 2005 BMW X5
To start off, 2005 BMW X5 is newer by 14 year(s). Which means there will be less support and parts availability for 1991 BMW M12. In addition, the cost of maintenance, including insurance, on 1991 BMW M12 would be higher. At 4,988 cc (12 cylinders), 1991 BMW M12 is equipped with a bigger engine. In terms of performance, 1991 BMW M12 (296 HP @ 5200 RPM) has 81 more horse power than 2005 BMW X5. (215 HP @ 4000 RPM). In normal driving conditions, 1991 BMW M12 should accelerate faster than 2005 BMW X5.
Because 2005 BMW X5 is four wheel drive (4WD), it will have significant more traction and grip than 1991 BMW M12. In wet, icy, snow, or gravel driving conditions, 2005 BMW X5 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, 2005 BMW X5 (520 Nm @ 2000 RPM) has 70 more torque (in Nm) than 1991 BMW M12. (450 Nm @ 4100 RPM). This means 2005 BMW X5 will have an easier job in driving up hills or pulling heavy equipment than 1991 BMW M12.
Compare all specifications:
| 1991 BMW M12 | 2005 BMW X5 | |
| Make | BMW | BMW |
| Model | M12 | X5 |
| Year Released | 1991 | 2005 |
| Body Type | Coupe | SUV |
| Engine Position | Middle | Front |
| Engine Size | 4988 cc | 2926 cc |
| Engine Cylinders | 12 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Horse Power | 296 HP | 215 HP |
| Engine RPM | 5200 RPM | 4000 RPM |
| Torque | 450 Nm | 520 Nm |
| Torque RPM | 4100 RPM | 2000 RPM |
| Engine Bore Size | 84 mm | 84 mm |
| Engine Stroke Size | 75 mm | 90 mm |
| Engine Compression Ratio | 8.8:1 | 18.0:1 |
| Drive Type | Rear | 4WD |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Length | 4370 mm | 4670 mm |
| Vehicle Width | 2000 mm | 1880 mm |
| Vehicle Height | 1110 mm | 1720 mm |
| Wheelbase Size | 2610 mm | 2830 mm |
