The BMW X5 30xd with a Swift Challenger SE 645 with an actual weight of 1745 kg is in general a good match and suitable for all journeys on all kinds of roads.
The motor preformance of the BMW is in general very good. And also the weight of the Swift with a User Payload (160 kg in the caravan and 200 kg in the car including passengers), is pretty good.
Flat roads
Towing Performance
300
382
Mountains
Risk of snaking
362
171
Weight ratio: 74% (81% of kerbweight)
1745 kg
2370 kg
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BMW X5 30xd Swift Challenger SE 645
Actual Weights
Swift Challenger SE 645: 1745 kg.
BMW X5 30xd: 2370 kg.
Noseweight: 95 kg.
Actual weight ratio: 74%.
Performance
The engine's performance is generally very good on flat roads (performance score to compare 300 points).
Speeds of 88 mph (142 km/h) to 92 mph (149 km/h) are often quite possible.
There is a lot of power at low engine speeds (score to compare 382 points).
Higher revs (1600 rpm) are usually not necessary on flat roads, under most circumstances.
Acceleration from 0-62 mph (0-100 km/h) is theoretically possible in 12.1 sec.
In the mountains the performance is generally very good (score to compare 362 points).
No problems are to be expected on steep mountain roads (up to 30%). Not even on Hill starts.
On motorway inclines hardly any higher revs are needed.
A speed of 79 mph (128 km/h) is usually possible on most motorway inclines.
Weight
The towing limit of the BMW is more than sufficient (check this in your vehicle documents).
If you passed your driving test after 1 January 1997, you will need a B+E driving license.
Weight ratio between the laden caravan and the loaded car is 74%. Common in the UK: the weight ratio between the laden caravan and the kerbweight of the car is 81%.
There is a small chance of snaking at higher speeds, strong side winds and thoughtless driving. Even if the combination normally feels stable, the forces by deflection side to side are great at high speed. For drivers with knowledge of, and experience in driving a caravan it is safe to drive, but proper and careful loading is still important! An electronic stability system in the car and / or on the caravan is worth considering.
Recommended noseweight is 95 kg.
Safe speed up to 62 mph (100 km/h).
Stability and safety score to compare is 171 points.
If the caravan starts to snake you should reduce your speed and slow down directly! Lift your feet off the accelerator and brake gradually. Hold the steering wheel into a fixed position.
Conclusion
Performance is very good.
If the caravan is well loaded safe driving is possible.
It's a perfect match!
Influence of User Payload on stability
Weight distribution and noseweight are vital in obtaining a stable caravan.