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Porsche keeps Harley-Davidson V-Rod ‘alive’

2002 Harley-Davidson V-Rod developed with Porsche events predictions
Original 2002 Harley-Davidson V-Rod developed with Porsche

While Harley-Davidson this year axed the V-Rod range, Porsche still fondly remembers its involvement in the revolutionary development of the bike with a proud display at their museum in Stuttgart.

This week I visited Stuttgart where good friend Jeromy Moore works as a race design engineer at the Porsche Engineering Group’s Weissach Development Centre where the V-Rod engine was developed.

Jeromy Moore, Porsche race engineer
Jeromy Moore, Porsche race engineer

Porsche Engineering employs 4500 engineers and technicians who come up with concepts and products for Porsche as well as other companies.

Ferdinand Porsche started the company as a small engineering firm in 1931 and the company has continued a long history of involvement in interesting sideline projects such as forklifts, boats and even airplane engines.

But their most significant joint development program was the V-Rod Revolution engine from 1996 to 2001.

Proud project

Jeromy guided me around the impressive Porsche museum which includes a 2002 V-Rod and the proud declaration of their involvement.

The plaque in front of the bike says:

“Against the backdrop of a collaboration stretching back to the 1970s, the Porsche engineers constructed a water-cooled 1131cc motor based on a racing engine that delighted Harley-Davidson’s demanding clientele both for its performance as well as its imposing sound. With a DOHC valvetrain and electronically controlled fuel injection, the VRSC-series Harley with its four-valve engine put out up to 120hp.”

The joint development project started in 1997 when HD engineers relocated to Stuttgart to begin working with German engineers. Harley and Porsche invested $US10m each into the venture,

Porsche was the ideal partner as they had just introduced the 996 powered by their first water-cooled engine. So they were well-versed in developing a water-cooled engine from scratch.

Until then, Harleys were only powered by air-cooled engines and It is believed some Harley engineers thought it blasphemous to develop a liquid-cooled engine. That is why Porsche was brought into the project.

At the time, all other Harley models were powered by 45-degree air-cooled V-twins with camshafts in the block.

The water-cooled V-Rod Revolution engine had a 60-degree crank with double overhead cams and four valves for each cylinder. This meant it could rev higher and cleaner to meet California’s tough emissions laws.

V-Rod engine developed with Porsche
V-Rod engine developed with Porsche

Interestingly, it has now been axed because it couldn’t be developed any further to meet even more stringent Euro emissions laws. Harley continues with liquid-cooled engines in the new Street 500, 750 and Street Rod.

Hurdles ahead

One of the issues Porsche engineers had to overcome in developing the Revolution engine was Harley’s demand to make the 60-degree V-twin sound like their 45-degree engines.

Other hurdles for the German engineers were hiding the water-cooling plumbing and the incorporation of faux cooling fins to make it look air-cooled.

The engine also had to cope with the overheating problem encountered by Harleys used in parades, cruising and idling in slow US traffic in scorching desert heat.

To meet Porsche’s standards, the Revolution also had to pass their rigours Düsseldorf Test that requires an engine to run for 500 hours without failure.

The V-Rod was not only reliable but unique with a fuel tank under the seat, a hydroformed chassis, hydraulic-actuated clutch and Automatic Compression Release for cold starts.

Yet it was met with some disdain by the Harley faithful who thought a water-cooled Harley was not a Harley at all.

Harley-Davidson VRSCDX Night Rod Special porsche
Harley-Davidson VRSCDX Night Rod Special

Over the years, there have been a few different models and engine sizes, but in the end it was killed off by the emissions laws it originally set out to conquer.

Porsche is proud of its achievement and still notes the engineering feat at its museum.

For those who also enjoy some four-wheeled “porn”, the museum at €6 per adult entry is worth the coin if you are in the area.

Rather than raving on about its virtues, here is a sample of the vehicles that were on display when we visited.

Porsche Museum in Stuttgart

Which is your favourite Porsche? Leave your comments below.

  1. The V-Rod and Night-Rod are fantastic machines. I think Harley are making a big mistake that they may later regret when they shut those lines down. Is there something specific to that engine that will not allow it to be engineered to meet new emission targets? After all, there are plenty of big twins in the market these days.

  2. Nike bikie machines of choice. These bikes were a great alternative to a Ducati Diavel or those looking to get into a cruiser seat on a sportier look.

    The want for one of these machines in Australia was killed by the Nike Bikies. Gucci/LV manbags, brand new white Nikes, Armani sunglasses and a gold chain is the ticket you need to ride one of these. 300 rear, air suspension, wedding hire and a unroadworthy certificate is where most of these v-rods end up.

    Every time I see an old fella on a v-rod which has a standard rear and running gear I rejoice. Great machine, tarnished by the scene.

  3. best motor harley produced liquid cooled is really a no- brainer i have a honda st with over 180,000 and no oil use..Speaking of honda they where running under the seat tanks since the first wing

  4. I noticed fluid( think coolent?) com’g out the bottom front after i started it up, I also noticed the fan was not wk’g…I’m gues’g I should replace the fuse…I refilled the radiator…

  5. I personally feel if Porsche could have made a larger capacity version, this would have been a far better engine than the 56º S&S X-Wedge 113c.i./2 litre engine in my Morgan Three Wheeler. The vibration from the S&S even with the latest version of the Centa Compensator (in effect a “cush” drive between engine and the Mazda MX5 gearbox) is pretty appalling and in my early 2012 car, was one of the factors in the fatigue failure of the original chassis, which had to be replaced.

  6. I love my 14 Muscle. When I first saw it I knew I could no longer hate motorcycles and had to learn to ride. Bought it later that year.

  7. Can I bore and stroke the 1250 nightrod? I can only seem to find tuners, pipes, and filters for upgrades. And of course forced induction. Please someone who knows this engine inside and out let me know

  8. I owned 2 Vrods – an 06 Night Rod and 08 Night rod special. Amazing machines

    Now I own 2 Porsche 911’s.. coincidence?

    1. Not a coincidence. I also have two Porsches, a 2018 Panamera 4 E-Hybrid to do school runs with grandchildren and a 1977 3.3l 911 RSR.

  9. Is there away we can buy parts for the VRSCB V-Rod and other motors and gaskets from Porsche. Since you made the engine Harley-Davidson don’t carry them anymore and it’s really hard to find any aftermarket sites that deal in them. Best HARLEY-PORSCHE MADE and would love to keep it running fine. I couldn’t ride any other Harley-Davidson even that new electric whistle they made any links to any motor parts would be greatly appreciated or add to site since only V-Rod site I’ve seen

  10. Awesome development! Is the vrod headlight designed after a Porsche’s headlight?

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