Plug-in hybrid electric cars can use four times more fuel than makers claim, costing owners an average of £462 per year more than expected, Which? has warned.
The consumer watchdog tested 22 popular hybrid models over 62 miles (100km) and found that they had all been advertised with unrealistic fuel efficiency figures.
On average, hybrid cars were found to be 61 per cent less fuel-efficient than promised.
Read Article