We bought a new Suzuki alto earlier this year for just such a job, 3 cylinder 1 litre. over 60mpg on a run and £20 a year road tax, insurance group 1. They were on a VAT free based offer at the time to it seemed like a no brainer really, we only need 2 cars at a weekend so we use the alto through the week and both cars at the weekend.
100% gutless but 10 out of 10 for thrash round fun and cheap motoring.