2011 XC70 T6, superb ride and seat comfort with a very relaxed, torquey, quiet and smooth driveline. XC60 too and generally speaking, just about any 900 Series or 2000-onwards V70/XC70 or S80. S60 and V60 are a bit firmer and XC90 too unsettled.

Other notables include E38 Seven Series on 16" wheels, L322 Range Rover V8 on sensible wheels, E39 Five Series petrol saloons on SE suspension and 15/16" wheels.

The X308 XJR with its adaptive damping is a thing of wonder too, the more modestly shod XJ8s better still, but the XJR also handles the corners much more tidily without sacrificing ride on the altar of containing body-roll.

Supercharged Range Rover Vogue

Like sitting in an armchair, a fast armchair

Interesting that no-one has even mentioned Rolls-Royce. Are we all anti-snob, or do we not have the experience ?

Interesting too, how many Jaguars of various ages get the nod. Except for X-Types, I agree with that trend ....

No direct experience, but I'd love to know if they are the best of them. The closest I've been is in the BMW Sevens that donate the driveline, but I don't know to what extent suspension/chassis technology is shared between E38 & Seraph, E65 & Phantom and F02 & Ghost. More than RR comfortably would let on I would guess...

Now sadly dead, but my Lancia Thema, I could drive her to the moon and back, wonderful alcantara armchairs, and a good relaxed driving position.

I had the S80 and S60 at the same time for a while (his'n'hers). The S60 was good, but the S80 was just fabulous.

Just got myself a new motor. Thought my previous one was comfortable (Mk3 Mondeo LX), but this one is infinitely better.

Quiet enough that a conversion can be had at 80mph without raised voices, and bumps don't seem to exist in any way at all, and the climate control can keep the cabin at a set temp without melting your face off followed by freezing your feet.

It's a Mk5 Astra Elite. Leather seats, comfort suspension and 205-55/16 tyres, diesel engine. Wafty.

Not mine but my old man had a 1990 vintage S class (W126?) for a while. The combination of the hewn from granite contruction (the doors weighed an absolute tonne) a huge woofling V8 and magic carpet like ride from the hydropneumatic suspension meant that this thing was quite unflappable over even the worse roads\potholes. It honestly felt like you were riding on a cushion of air as long as you didn't try to pitch it too hard into corners at which point it felt like you were in a boat rather than a car.

Have distinct memories of wafting along at well into 3 figures on an overseas trip with nothing but the subdued noise of the V8, quietly accompanying the rapid progress. Not been in a more comfortable car since and that includes all sorts of newer Mercs.

Toss up between my old Rover 414SLi sofa-car, and my A4 Quattro Sport. Surprisingly good ride for an Audi on 18's, but then it wasn't an S-line, and the heated leather seats, with all the electric adjustment you'd ever need, and armrest, made it a very nice place to sit.

My old Caterham Roadsport - drove thousands of miles throughout Europe and always felt cosseted and very comfortable.

Have owned numerous Jags, Mercs etc and never felt as comfortable as in the Caterham.