Hey,
I think the question is how to make a car "APEAR" of lesser value to reduce the VRT payment.It's simple-you cant.Extra spec (leather seats, alloy wheels etc) on the car adds to a higher market value so increases the VRT payment(not by much though),so bar taking off the wheels it's imposible.
Tampering with the car (speedo etc) is fraudulant, you WILL get caught, and I dont think a judge will laugh it off.
I bought an A4 TDI in the UK, paid the VRT, and am happy that I got a car of higher spec for slightly less than a bog standard one over here cost's.
Still though VRT=rip off.Free movement of goods and services???????????