So my girlfriend has just got her renewal through, £1600 from Tesco. Last year it was £1250. Went on a price comparison site, the cheapest was Tesco, quoting around £1100. Whilst on the phone to Tesco she did a quote on Tesco's website and got quoted £916. So if you just renew your car insurance automatically without challenging a quote, there's a word of warning for you. Sent from my I-Oven using the internets