Here's the place to chat about all things classic. Also includes a feedback forum where you can communicate directly with the editorial team - don't hold back, they'd love to know what they're doing right (or wrong of course!)
That's an XK engine, came in 3.8litre or 4.2 litre format, and was fitted in just about every Jaguar from the 50s up to the 80s, including the beautiful XK120/140/150 sports cars, the "Mark" Jaguars including the Mark 10 and the popular Mark II, and also E-types, it ended with the end of production of the XJ6 saloons.
It was, IMHO, one of the best engines ever made.
I'm no expert but that's roughly right. It'd take a serious expert to identify exactly which car that engine came from using only the information in the photos!
Some people are like Slinkies - they serve no useful purpose, but they still bring a smile to your face when you push them downstairs.
Luxo - You are right but also I am also no expert on these engines but it is of an early type - you can tell by the old series long tube air filter
1937 Jowett 8 - Project - in less pieces than the Jupiter
1943 Jowett Stationary Engine
1952 Jowett Jupiter - In lots of peices http://Jowett.org/
1952 Jowett Javelin - Largely original
1973 Rover P6 V8 - Original / 22,000 miles
Unless it's simply sinking into the soft mud, that's a 2.4 from a Jaguar 2.4 litre, a.k.a MK1. Other capacities were noticeably taller externally and a late 2.4 from the "entry level" 240 - the one that shared the shape of the MK2 but not its lovely big bumpers or power - should have a Lucas AC11 or similar alternator attached to it.
Hmm, maybe it is sinking? That airbox isn't a MK1 thing as they had an elongated oval shape but everything else says 2.4..
J "Home is where you park it", so the saying goes. That may yet come true..