The Honda CR-Z averages 56.5mpg and emits 117g/km of CO2 both impressive figures in isolation. Until that is, you sacrifice a little style and opt for a small diesel hatch. The Mini Cooper D averages 72.4mpg and emits just 104g/km of CO2.

Here the hybrid coupe excels. It’s average fuel consumption of 56.5mpg and 117g/km of CO2 might not sound that impressive beside the diesel Mini Cooper we have been referring to, but the small petrol 1.5-litre also emits low levels of harmful Nitrogen Oxide (NOx) and low levels of particulates, There’s also graphics that help encourage economical driving, one of which including a plant that blooms into a flower if you really behave.

It is difficult to assess how reliable the CR-Z will be because both the Insight hatch and Honda coupe are yet to feature in customer satisfaction surveys. Historically, the brand as a whole has basked in fine ratings, posting an impressive second place in a recent survey for satisfaction. Using the Civic as a guide, it’s reassuring its owners are a generally a satisfied bunch, although the current generation model has suffered the occasional reliability glitch so it’s not perfect.