This is irrelevant, if you're going to get a car like the Porsche 718 Cayman S then fuel economy doesn't really matter all that much unless you plan to go on a long trip with very few gas stations along the way. 28.39mpg is good enough for me.
Porsche Cayman S Is By No Means Economical
The Porsche 718 Cayman S may deliver 345 bhp but its new turbocharged four-cylinder engine is by no means economical with its real-world fuel economy rating.
Having worse fuel economy than the V6-powered Jaguar F-Type, the 718 Cayman S had a combined real world figure of 28.39mpg which is 18.7% less than the 34.9mpg Porsche has on paper. You’d think the change from a six-cylinder engine to a four cylinder would improve fuel economy but it still saw worse numbers than the F-Type. Jaguar’s F-Type had a real world fuel economy figure of 28.79mpg which is 14.3% less than the claimed 33.6mpg.
While this is not as bad as the 718 Cayman S, all that extra fuel used will add up for both vehicles. Both cars were tested along with 20 other models by What Car’s new True MPG process. The tests took place at a NEDC approved testing center and they made sure the Millbrook Proving Ground’s driving conditions were the same for every car tested.
But, we must remember that a car’s fuel economy can change depending on the driver, traffic and road conditions. This point was brought up by a Porsche spokesman; “of course, the real world will present variations based on road conditions and driving styles. It can be higher than the official standard fuel consumption, but also lower if the driver adopts an appropriate driving style.”
At least the 718 Cayman S didn’t perform as bad as the Audi A4 3.0 TDI 218 which saw a shortfall of 36.2% when they compared its real world fuel economy rating (42.0mpg ) to Audi’s official fuel economy of 65.9mpg.
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Just in case someone does care about fuel economy, one of the best ways to improve it, if you have SC, is to not use Sport mode. All those farts and gurgles are wasted fuel.
But, I love my farts and gurgles so never mind
But, I love my farts and gurgles so never mind
Freudian! >
But yeah: The number of cylinders is not directly correlated to fuel efficiency, particularly for those who drive it in any way other than an 80-year-old. My current car is a BMW 228i M Sport: 4-cylinder dual-stage turbo engine. It's a relatively quick car. I drive it with "passive aggressiveness", which is my term for my style. I average about 18.5 MPG. It's rated at 26 EPA combined.
In fact, the only car I've owned that I have averaged better than 20 MPG since my '06 MINI Cooper (I averaged 22 in it) was a hybrid: a Lexus CT 200h F Sport. Even in it, I typically averaged about 26 MPG.
I just had to google it
Research Octane Number (RON)
The most common type of octane rating worldwide is the Research Octane Number (RON). RON is determined by running the fuel in a test engine with a variable compression ratio under controlled conditions, and comparing the results with those for mixtures of iso-octane and n-heptane.
Motor Octane Number (MON)
Another type of octane rating, called Motor Octane Number (MON), is determined at 900 rpm engine speed instead of the 600 rpm for RON.[1] MON testing uses a similar test engine to that used in RON testing, but with a preheated fuel mixture, higher engine speed, and variable ignition timing to further stress the fuel's knock resistance. Depending on the composition of the fuel, the MON of a modern pump gasoline will be about 8 to 12 octane lower than the RON, but there is no direct link between RON and MON. Pump gasoline specifications typically require both a minimum RON and a minimum MON.
Anti-Knock Index (AKI) or (R+M)/2
In most countries, including Australia, New Zealand and all of those in Europe,[citation needed] the "headline" octane rating shown on the pump is the RON, but in Canada, the United States, Brazil, and some other countries, the headline number is the average of the RON and the MON, called the Anti-Knock Index (AKI), and often written on pumps as (R+M)/2. It may also sometimes be called the Posted Octane Number (PON).
Difference between RON, MON, and AKI
Because of the 8 to 12 octane number difference between RON and MON noted above, the AKI shown in Canada and the United States is 4 to 6 octane numbers lower than elsewhere in the world for the same fuel. This difference between RON and MON is known as the fuel's Sensitivity,[5] and is not typically published for those countries that use the Anti-Knock Index labelling system.
See the table in the following section for a comparison.
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