The kerb weight of the RAV4 you mentioned depends on whether it’s the two or four-wheel-drive model. If it’s the former, the kerb weight is 1690kg, if it’s the all-wheel-drive model, the kerb weight is 1775kg. I know you asked for tare weight, but the only difference between kerb and tare weight sis that tare weight is the mass of the empty vehicle with 10 litres of fuel in its tank, while kerb weight is the same empty vehicle but with a full tank of fuel.

Of perhaps more interest to anybody towing is the fact that the two-wheel-drive RAV4 can tow 480kg while the AWD version can cope with 1500kg. The 2WD Rav’s GVM, meanwhile, is 2185kg and the AWD’s is 2230kg. The two-wheel-drive RAV4’s GCM is 2665kg, while the all-wheel-drive’s GCM is 3730kg.

Some of this information is quite difficult to find (even if you have the owner’s manual) yet it’s crucial safety information and should be more readily available. Some car makers seem very coy about publishing GVM and GCM limits, possibly because they don’t always reflect well on the product’s ability to tow and carry a load at the same time.

A noise or vibration that is engine speed dependent is usually associated with the driveline, while a similar problem that occurs at a particular road speed is more often a problem with a wheel or suspension component. The main exception to that is the differential which is part of the driveline but determines the vehicle’s speed, so can contribute a speed-dependent noise or vibration, too.

Beyond that, you could be looking at a fault with a wheel bearing, a deformed tyre, bent rim, worn suspension bush, bent axle or suspension arm or pretty much anything else. A rolling-road dynamometer (kind of like a treadmill for cars) might be one way of achieving the problem speed while a mechanic looks and listens on.

There’s a huge range of towing limits for the RAV4 thanks to the sheer number of model variants. In simple terms, the non-hybrid two-wheel-drive versions can tow a braked trailer of 800kg while a two-wheel-drive hybrid RAV4 can only cope with 480kg. Which means that if you want a RAV4 for towing, you’re best to look at any of the all-wheel-drive versions (hybrid or non-hybrid) which have a braked towing limit of 1500kg.

Of course, those figures are for braked trailers, while your question was for a trailer with no braking of its own. In that case, the two-wheel-drive RAV4’s limit stays at 480kg, while the all-wheel-drive’s limit falls to 750kg.

Gross Combined Mass (the total weight of the vehicle, the trailer and anything being carried including passengers, fuel, luggage and accessories) meantime, is harder to find and you need to resort to the owner’s manual (which is a problem if you haven’t bought the car yet). In any case, the two-wheel-drive RAV4’s GCM is 2665kg, while the all-wheel-drive’s GCM is 3730kg.

I’m unsure why this last piece of the puzzle is so difficult to find, but information like this should be more readily available as it’s a critical safety issue and something that many owners inadvertently get wrong with serious legal and insurance ramifications.