FuelFacts

2009 Porsche Carrera 4 S Cabriolet MPG & Specs — Real-World vs EPA, All Trims

Every gas trim of this model takes premium.

20–21
MPG combined (18 city / 25–27 hwy)
$3,343–$3,510
est. fuel / year (today's prices, 15k mi)
Premium
gas type

Is the 2009 Porsche Carrera 4 S Cabriolet good on gas?

At up to 21 MPG combined, the 2009 Porsche Carrera 4 S Cabriolet is about average for a Minicompact Cars — that class averages about 21.0 MPG across 1,649 EPA-tested versions, so it's middle-of-the-road for its size.

Real-world MPG vs the EPA number

The EPA figures above come from a standardized dynamometer test, not the open road — real-world MPG typically runs a bit lower depending on your driving, climate and terrain. That's true of every car on this site, old or new.

At today's AAA national average price — $4.68/gal for premium gas as of 2026-07-05 — the most efficient trim runs about $3,343/year (roughly $279/month, about $22.29 per 100 miles) at the EPA's assumed 15,000 miles/year, using an estimated 714 gallons a year. We don't estimate a cost-per-fill since exact tank size isn't in the public EPA dataset, but the per-100-mile figure scales to any tank. Current national average gas prices →

2009 Porsche Carrera 4 S Cabriolet trims & fuel economy

Trim (engine / transmission)FuelMPGFuel/yr (today's price)
3.8L 6-cyl, Automatic 7-spd, AWDPREMIUM21$3,343
3.8L 6-cyl, 6-spd manual, AWDPREMIUM20$3,510
Where the EPA lists premium, that’s the fuel the maker specified for the mileage test — many such engines run on regular with slightly less power/MPG. Whether premium is required or just recommended is an owner’s-manual detail the EPA dataset omits, so we don’t guess it.

2009 Porsche Carrera 4 S Cabriolet specs

What the EPA test-car listings record for this model year — every combination sold is a row in the trims table above.

Engine options3.8L 6-cyl
TransmissionAutomatic 7-spd · 6-spd manual
Drive typeAWD
EPA body classMinicompact Cars
FuelPremium

Other years of the Porsche Carrera 4 S Cabriolet

2008 Porsche Carrera 4 S Cabriolet2007 Porsche Carrera 4 S Cabriolet2006 Porsche Carrera 4 S Cabriolet2005 Porsche Carrera 4 S Cabriolet2004 Porsche Carrera 4 S Cabriolet

Similar cars (Minicompact Cars)

2009 Porsche Carrera 2 Cabriolet2009 Porsche Carrera 2 Coupe2009 Porsche Carrera 2 S Cabriolet2009 Porsche Carrera 2 S Coupe2009 Porsche Carrera 4 Cabriolet2009 Porsche Carrera 4 Coupe

Cars that take premium · Cheapest cars to fuel · Where fuel grade depends on the trim · Fuel guides

2 trim(s) · EPA FuelEconomy.gov data retrieved 2026-07-24 · fuel prices AAA national average as of 2026-07-05.