Thanks for your replies. I don't think this engine has been
sold under Volvo brand. The Volvos of the same size, for instance MD21/31 and TMD22 all run at higher revs, 3600-4500 rpm, and have significantly smaller
displacement than the Perkins' 3,9 litre. Of course, Volvo S130 or S150 could be an alternative anyway.
What about Twin Disc Technodrive SP60? Does anyone have experience from this? According to the dealer, it has a very strong
clutch, which copes good with torque at low revs.