I'm looking to buy a decent but not expensive bike rack to fit on a hatchback car (Vectra). It needs to carry two mountain bikes, on the rear not in the roof and there is no towbar.
Saris Bones 2, about £100 and worth it as they're solid, reliable and fits pretty much every car known to man. You'll be fine with mountain bikes, only thing I found it can't take are ladies step-through shopper bikes that have no cross bar (there's an additional adaptor that solves this) https://www.halfords.com/camping-le...s/saris-bones-black-2-bike-rear-cycle-carrier
I've got a Saris Bones 3 and never had any issues with it, easy to fit, rock solid once it's on. The only thing I added was a cable lock to wrap around the bikes and through the rack to make the whole thing harder to steal.