I would like to buy either Q5 or Q3 but donot undertstand the major difference between the two cars. my budget is R400,000 which is about US$50 000
Q3 despite quattro in most models is pretty much for onroad use, Q5 has some offroad hope as a softroader on weekends. Driving position of both is higher than sedan - Q3 handles more like a golf, Q5 a bit more like an A4 - seating position subjectively feels higher in Q3 than Q5. At R400K unless you're buying preowned you're not going to find much. Go search for reviews online and visit a dealer and figure out what you want and expect from your vehicle.
we have the Audi Q5 automatic - there is a clunking through the early gears - around 20 mph anyone else had this problem