I’ve been around air-cooled cars all my life. Both my parents had VW Beetles, so when it came time to replace my hand-me down first car, a ’71 Ford Capri, it isn’t surprising I went for a ’72 Super Beetle. Then years later, after I found out that Heidi had an heirloom 1958 Porsche 356A Cabriolet in the family, I made it my mission to get that car in our garage. Since then, we acquired an ’06 Boxster, ’86 Carrera Cabriolet, ’95 Carrera, ’85 Ferrari 308 and an ’04 996 Turbo X50. We still have all but the Boxster.
From all our adventures over the years with the cars and the inevitable maintenance, it seemed like it would be fun to talk a little about the differences between air-cooled and water-cooled Porsches. With the 993 and the 996 side by side, it set the stage for, as close a comparison as we could come up with for the wonderful features of each. We dive into the traditional simplicity of “air and oil do it all” versus the efficiency, scalability, and convenience of a modern pressurized liquid system.
What To Expect in this Porsche Engine Comparison Video
In this video, we explore the pros and cons of each system and even talk a little bit about some of what went into Porsche’s decision to abandon so many years of air cooled tradition in the 911 line. With the introduction of the 996 model in 1999, Porsche was facing stricter noise and emission regulations in both the European and US markets. In addition, the venerable flat six had climbed to 3.6L and close to 300HP in the NA cars and finally 450hp in the Turbo S. It was at this point that the cars were just finally outgrowing this older, louder, less scalable and less precise cooling technology and had to figure out a way to move to the industry standard of pressurized water/ Ethylene glycol. This necessitated a complete engine re-design which occurred in parallel with a complete chassis and drivetrain redesign.
At the end of the video, we compare the sound differences, to give you an idea of just how different they really are. The 993 shows off that great whoosh-ey goodness while I don’t think anyone would complain about the 996’s proper cabin heating and cooling, and engine temperature management that doesn’t require keeping an eye on that oil temp gauge in hot weather. Which is your favorite?
This post is from our newest contributor Franny, from Heidi and Franny’s Garage on YouTube.
View Comments (11)
I just started watching Franny's tech videos. They are great!
Franny, thank you for your detailed explanation that was much appreciated and thought provoking. Still, give me an air-cooled engine. Few of us drive our cars during the winter and heat for the driver and passenger is seldom an issue. However you explained the need for an additional/larger oil cooler.
Wait a minute, those of us who drive their cars in the winter (like me) really appreciate the great heater and heated seats. With 4 Michelin Pilot Alpin snow tires, my 014 Careers S goes through the snow like a tank.
Thanks Chris!
Franny
Franny,
Never have seen one of your videos, but informative & interesting comparison. I owned a 2004 996 for 4 years, before smashing the front right radiator into a mailbox. Based on what I read on flatsixes.com, the 996 seems to be the black-sheep Carrera. But I thought it was a great car. Could have used a little more power compared to modern Carreras, but very well-behaved for daily street-driving. If I can ever afford another one, was going to go for a 997, though. Thank You for your insightful comparison. Look forward to your next video.
Travis Young
I've had both air- and water-cooled flat-6 Porsches. I agree! The air-cooled cars have a beautiful, soaring sound. However, in today's world, they're not tenable. So! I happily drive the modern water-cooled flat-6.
Great video!!! Have to say my 3.2 84 Carrera will put out heat in the cabin very fast!!!
Ken Jones
I have both. The Carrera 3.2 increases testosterone and andreneline. My Cayenne is rugged, efficient and comfortable. Thank you for your video., really enjoyed it.
Great video! Appreciate all the time spent getting that together.
Congrats on making it to FlatSixes.com! You've made it to big times now.
My 1995 993 also has only one oxygen sensor to replace ws four on 1996 thru 1998.