Original Rhode Gear Euro Shuttle, carrys two bikes in line with the car on a cradle and QR system, plus cradle for front wheel. £55
I used this a few times and found it to be a very secure and safe way to carry bikes, no risk of scratching to the bikes or the cars. This has all the velcro straps for extra ..erm...strapping, plus I made two extra side clamps when I had a Celica as, frankly I used to drive like a maniac and they gave even more lateral support when cornering hard. Another option would be to just drive like you weren't trying to kill yourself.
Photos below, showing options for saloon/sedan type cars or stupid cars with ridiculous spoilers.
I used this a few times and found it to be a very secure and safe way to carry bikes, no risk of scratching to the bikes or the cars. This has all the velcro straps for extra ..erm...strapping, plus I made two extra side clamps when I had a Celica as, frankly I used to drive like a maniac and they gave even more lateral support when cornering hard. Another option would be to just drive like you weren't trying to kill yourself.
Photos below, showing options for saloon/sedan type cars or stupid cars with ridiculous spoilers.