In 2016, Porsche fitted a new four-cylinder turbo engine to its Boxster and Cayman sports cars, calling them the 718 after a race car it built in the late 1950s.

The concept appeared to be a good one for affluent petrolheads.

What a shame that the engine didn’t roar so wonderfully.

They improved the performance and speed of Boxster and Cayman 718s. But the sales waned is it feels like a Beetle if you are being polite – or a pig farting if you aren’t.

If you missed the six-cylinder engines, which is also one of the options, you would buy a Cayman GT4 with the 4.0-liter engine taken from the 911 but without the turbochargers and larger by a liter in capacity.

Porsche came out with the second generation Cayman GT4 last year, and we test-drove it. Not cheap at $75,000, but the best sports car you can buy with any sum.

That was until the new Cayman GTS came along, which we tested before lockdown.

First, it utilizes the very same engine as GT4 does, which is a 4.0-liter flat-six that is naturally aspirated.

The only distinction between the GT4 and GTS is that the engine revs to 8,000rpm in the former and 7,800rpm in the latter. Out of the lost 200rpm goes 20bhp, but you won’t know when you’re driving on the road because GTS still has 394bhp and the same 431Nm of torque.

Porsche will have only done it for marketing reasons so that the GT4 is still top dog and justifies its extra cost.

So what do you lose having saved 14,300 USD by buying the 83.500 USD Cayman GTS?

Again, not much you’ll notice on UK roads. Firstly it doesn’t have the same aerodynamic package as the GT4 because the rear wing has gone and there’s no underbody diffuser. Bang goes 100kg of downforce at 150mph.

Also, the front suspension on the more extreme car has risen joints whereas the GTS’s suspension has standard rubber bushes.

Rose joints are what you find on racing cars – they make the suspension geometry more accurate but transmit more shocks from the road.

You’re going to love this car if you’re a traditionalist because like the GT4 it comes with a six-speed manual gearbox – well, almost the same but with a slightly longer gear lever movement.

It’s a lovely gearbox to use and has an auto-blip function that raises the engine revs a little as you change down a gear.

Unless you really need the two small rear seats there’s no reason to buy a 911 over this car.