This article is from the Lotus Cars FAQ, by email@example.com (Alan F. Perry) with numerous contributions by others.
A 1470cc and a 1565cc version of the Renault R16 were originally
used in the Europa-Renault.
As described below, there are other options as well.
Mark Reichert (firstname.lastname@example.org) writes:
John O'Connor (email@example.com) writes:
>Other alternative, get the Renault 16 TS engine and gearbox. (You have
>to reverse the diff of course.) This gives you a crossflow head for
>which you can get all manner of tuning parts (via the Gordini sources)
>and a 5 speed box. The block has the same mounts as the original
>engine and if you want to keep it simple will mate to your current
>transmission. However, it is worth doing the work to put the 5 speed
Or, you could use the engine out of an R17. These come in a few
varieties. There's the 807, which is a hemi/crossflow head version of
the 821. I think that this might be the same engine used in the R16TS.
The block is the same. The pistons are different (to account for the
changed head). Then there's the 843, which a 1647cc version of the 807.
Parts are more available for the 843, as Renault used them in the R17,
R18, and some Fuegos. [I've also seen reference to the 844, which seemed
to be *the* hot setup, but I've been unable to locate one of these
Used 843's can be had in the $300 price range. 807's seem to cost a
little more. They are rarer, and rumor has it that they can be tuned
better. I don't know that I believe that rumor.
Both of these engines used Bosch fuel injection at some point, so it's
available if you want it (like I do). I think the 807's used D-Jet. The
843's used L-Jet (L-Jet+Lambda in the R18 & Fuego). If you want fuel
injection, it's best to get the intake plenum off of an R17, as the later
cars went to longer intake runners which probably won't fit in the S2
An 843 will bolt up to your S2's 336 gearbox, but *some* 843 blocks have
their motor mount points moved, so new brackets need to be fab'd.
There are also some issues with belts, pulleys, and exhaust on the 843
that I'd be glad to discuss with anyone whose considering this upgrade.
I've put an 843 in the S2 that I'm restoring.
Here's some info on differences among the renault engines:
Stock Europa Stock Stock 821 821 807 843 ----- ------ ----- ----- Valve Timing ------------ Inlet opens deg BTDC 10 35 21 24 Inlet closes deg ABDC 42 65 59 68 Exhaust opens deg BBDC 46 65 59 68 Exhaust closes deg ATDC 10 35 21 24 Valve Size (mm) --------------- Inlet 35 37.5 40 42* Exhaust 31 31 35.35 35.35 Compression Ratio 8.6 10.25 7.6,8.6 9.6 Static Advance (deg) 0 4 0 4