The Opel Vectra 1.8 16v [c.r.] with a Avondale Dart 556-6 with an actual weight of 1245 kg is in general a good match and suitable for journeys on most kinds of roads, sometimes with some limitations in the mountains.
The motor preformance of the Opel is in general more than sufficient. And also the weight of the Avondale with a normally distributed User Payload (200 kg in the caravan and 200 kg in the car including passengers), is pretty good.
Flat roads
Towing Performance
191
101
Mountains
Risk of snaking
184
170
Weight ratio: 73% (83% of kerbweight)
1245 kg
1695 kg
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Opel Vectra 1.8 16v [c.r.] Avondale Dart 556-6
Actual Weights
Avondale Dart 556-6: 1245 kg.
Opel Vectra 1.8 16v [c.r.]: 1695 kg.
Noseweight: 70 kg.
Actual weight ratio: 73%.
Performance
The engine's performance is generally fairly good on flat roads (performance score to compare 191 points).
Speeds of 68 mph (110 km/h) to 74 mph (120 km/h) are often quite possible.
There is only moderate power at low engine speeds (score to compare 101 points).
Slightly higher revs (2900 rpm) may be necessary under normal conditions on flat roads.
Acceleration from 0-62 mph (0-100 km/h) is theoretically possible in 23.6 sec.
In the mountains the performance is generally fairly good (score to compare 184 points).
No problems are to be expected on steep mountain roads but the performance is not that great. Hill starts are possible on steep slopes up to 11%, but do require some experience from the driver.
On motorway inclines higher revs (5100 rpm) are needed.
A speed of 58 mph (94 km/h) is usually possible on most motorway inclines.
Weight
The towing limit of the Opel is sufficient (check this in your vehicle documents).
If you passed your driving test after 1 January 1997, a B driving license is enough.
Weight ratio between the laden caravan and the loaded car is 73%. Common in the UK: the weight ratio between the laden caravan and the kerbweight of the car is 83%.
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 70 kg.
Safe speed up to 62 mph (100 km/h).
Stability and safety score to compare is 170 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 more than sufficient.
If the caravan is well loaded safe driving is possible.
It's a good match, sometimes with some limitations in the mountains.
Influence of User Payload on stability
Weight distribution and noseweight are vital in obtaining a stable caravan.