Octane rating is a measure of the fuel’s resistance to knocking or pinging during combustion.
A higher octane suggests there is a larger compression on the engine without premature detonation which can boost performance.
Ahead of the test, the specialists predicted that the Tesco Momentum 99 or the Shell V-Power 99 would offer the best readings.
After conducting the rolling road, it was evident that the premium fuels had indeed led to a rise in performance.
The Esso 95 Standard Unleaded produced just 456bhp, almost 10bhp lower than the best premium brands.
Tesco Momentum 99 topped the list of high-street fuels with the assessment showing the car producing 464.2bhp.
Shell V-Power 99 was next with a reading of 463.4bhp, followed by Esso Supreme+ 99 at 459.8bhp and BP Ultimate 97 at 459.5bhp.
Ben, an expert speaking to Officially Gassed, said: “Tesco’s always what I personally like to tune customers’ cars on because I find it so predictable. It’s always the same.
“Whereas the Shell there is a variation there. I don’t know why. Tesco’s is the one If you don’t have a Tesco’s near you and you just have a Shell. It’s fine.”
Although premium fuels are known to show a boost in performance, whether motorists use them in their vehicles is still up for discussion.
Swansway Garages has previously warned everyday vehicles may not enjoy the same benefits as higher-performance models.
They explained: “ If you own a high-performance vehicle that explicitly recommends or requires premium fuel, it’s best to follow those guidelines to maximise performance.
“However, for most everyday vehicles with standard engines, using regular unleaded petrol can actually be more cost-effective.”