2003 BMW 320 vs. 2013 BMW 6 series
To start off, 2013 BMW 6 series is newer by 10 year(s). Which means there will be less support and parts availability for 2003 BMW 320. In addition, the cost of maintenance, including insurance, on 2003 BMW 320 would be higher. At 4,395 cc (8 cylinders), 2013 BMW 6 series is equipped with a bigger engine. In terms of performance, 2013 BMW 6 series (437 HP @ 5500 RPM) has 296 more horse power than 2003 BMW 320. (141 HP @ 4000 RPM) In normal driving conditions, 2013 BMW 6 series should accelerate faster than 2003 BMW 320. With that said, vehicle weight also plays an important factor in acceleration. 2013 BMW 6 series weights approximately 519 kg more than 2003 BMW 320. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2013 BMW 6 series is all wheel drive (AWD), it will have significant more traction and grip than 2003 BMW 320. In wet, icy, snow, or gravel driving conditions, 2013 BMW 6 series 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, 2013 BMW 6 series (651 Nm @ 4500 RPM) has 321 more torque (in Nm) than 2003 BMW 320. (330 Nm @ 2000 RPM). This means 2013 BMW 6 series will have an easier job in driving up hills or pulling heavy equipment than 2003 BMW 320. 2013 BMW 6 series has automatic transmission and 2003 BMW 320 has manual transmission. 2003 BMW 320 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2013 BMW 6 series will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2003 BMW 320 | 2013 BMW 6 series | |
| Make | BMW | BMW |
| Model | 320 | 6 series |
| Year Released | 2003 | 2013 |
| Body Type | Coupe | Coupe |
| Engine Position | Front | Front |
| Engine Size | 1995 cc | 4395 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 141 HP | 437 HP |
| Engine RPM | 4000 RPM | 5500 RPM |
| Torque | 330 Nm | 651 Nm |
| Torque RPM | 2000 RPM | 4500 RPM |
| Engine Bore Size | 84 mm | 89 mm |
| Engine Stroke Size | 90 mm | 89 mm |
| Engine Compression Ratio | 17.0:1 | 10.0 :1 |
| Fuel Type | Diesel | Gasoline |
| Top Speed | 221 km/hour | 250 km/hour |
| Acceleration 0-100mph | 8.8 seconds | 4.5 seconds |
| Drive Type | Rear | AWD |
| Transmission Type | Manual | 8-speed shiftable automatic |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1490 kg | 2009 kg |
| Vehicle Length | 4490 mm | 5009 mm |
| Vehicle Width | 1760 mm | 2081 mm |
| Vehicle Height | 1380 mm | 1392 mm |
| Wheelbase Size | 2730 mm | 2968 mm |
| Fuel Tank Capacity | 63 L | 70 L |
