Vantage 4.5 V8

[JohnG1]

http://www.automobilemag.com/news/interview-dan-sa...

Interesting read...

[telum01]

I'm hoping to rebuild my grey car's 4.3L into a 4.5L in the next couple of years... Had the info somewhere, can't remember where, but it's supposed to be an easy change, mechanically.

[Jon39]

Block and head the same as road cars, stated in the article.

Why 4.5 litres then?

Do Prodrive use a 4.3 block or a 4.7?

If 4.7, does the different crank have a shorter stroke to allow better performance, which if the block is standard, would presumably need longer connecting rods?

Just interested in why the capacity would be changed to 4.5.

[v8vantage]

Standard 4.3 engine and crankshaft with bored out liners for larger pistons.

http://astonmartins.com/wp-content/uploads/2013/01...

[telum01]

I just realized this was about the 2017 GTE car using a 4.5L engine... My post above was about the original 4.5L engine in the GT2 a decade ago, which was based on the 4.3L. Like the new 4.5L, that one was just a matter of internals being changed out to get the different displacement. I haven't looked at the regulations yet, but I'd guess the downsized displacement was done to help them with balance of performance. Probably downsized the 4.7L by having a shorter stroke.