Porsche Boxster and Cayman (981)

The last Boxster and Cayman with six-cylinder engines across the whole range, a 2.7-litre or a 3.4-litre in the S, before the 718 cars of 2016 switched to four-cylinder turbos. Porsche Club GB says these engines have shrugged off the issues of the earlier 987 cars, which makes the 981 the sweet spot for anyone who wants the flat-six sound without the old worries. Wear and added complexity can still bring unexpected bills after about five years or 50,000 miles, so read the service history closely. In a Boxster, check the roof and sniff for the musty smell of a water leak.