Yes, a Porsche Tractor.

One of those showed up at a PCA chapter meeting I attended last year.

The tractor race at rennsport was cool , 

a few guys went real overboard painting up their tractors and adding trailers etc

Vasek Polak had one in his Porsche showroom for years , 

it was Porsche designed , they were not built by Porsche ,  

and they built 1-2-3 and 4 cylinder models......

In reply to Kreb :

Now that's a test we want to see!

Kreb said:

Yeah, but the IMS bearing..... I wonder if it's any faster than my dads Lamborghini tractor?

 

Or my dad’s David Brown.  Yes the same David Brown on an Aston Martin DBXX

Don't forget Lamborghini built tractors, too.  Both wheeled ones, and crawler tractors like this one:

A 401 CJ said:

Kreb said:

Yeah, but the IMS bearing..... I wonder if it's any faster than my dads Lamborghini tractor?

 

Or my dad’s David Brown.  Yes the same David Brown on an Aston Martin DBXX

 

Uh oh, is that a Muscle Tractor?

Yes, Muscle Tractors are a thing.

Tactical Penguin said:

I was too young to remember much about it, but my grandfather belonged to an antique tractor club and they used to have tractor shows out at Summit Point because Bill Scott was friendly to the group.  Mr. Scott would allow the tractors out on a section of the main circuit for a "slow tractor" race and would participate on his Porsche tractor, and the club would graciously "let" him win every time.

As I recall, it was a "one-lap" race, with tractors positioned around the track, based on supposed top speed. In theory, all tractors would reach the finish line at the same time. Don't think it quite worked out that way. I probably saw 2 of those races, in conjunction with vintage racing weekends. I actually wished I could take my '52 Farmall C to Summit Point.