2007 BMW X3 vs. 1991 BMW M12
To start off, 2007 BMW X3 is newer by 16 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 148 more horse power than 2007 BMW X3. (148 HP @ 4000 RPM) In normal driving conditions, 1991 BMW M12 should accelerate faster than 2007 BMW X3.
Because 2007 BMW X3 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, 2007 BMW X3 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, 1991 BMW M12 (450 Nm @ 4100 RPM) has 120 more torque (in Nm) than 2007 BMW X3. (330 Nm @ 2000 RPM). This means 1991 BMW M12 will have an easier job in driving up hills or pulling heavy equipment than 2007 BMW X3.
Compare all specifications:
| 2007 BMW X3 | 1991 BMW M12 | |
| Make | BMW | BMW |
| Model | X3 | M12 |
| Year Released | 2007 | 1991 |
| Body Type | SUV | Coupe |
| Engine Position | Front | Middle |
| Engine Size | 1995 cc | 4988 cc |
| Engine Cylinders | 4 cylinders | 12 cylinders |
| Engine Type | in-line | V |
| Horse Power | 148 HP | 296 HP |
| Engine RPM | 4000 RPM | 5200 RPM |
| Torque | 330 Nm | 450 Nm |
| Torque RPM | 2000 RPM | 4100 RPM |
| Engine Bore Size | 84 mm | 84 mm |
| Engine Stroke Size | 90 mm | 75 mm |
| Engine Compression Ratio | 17.0:1 | 8.8:1 |
| Drive Type | 4WD | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Length | 4570 mm | 4370 mm |
| Vehicle Width | 1680 mm | 2000 mm |
| Vehicle Height | 1860 mm | 1110 mm |
| Wheelbase Size | 2800 mm | 2610 mm |
