I have an 84Ci Sport that I have owned for 20 years as of January just gone. I bought it in 2006 with 25K miles on the clock and it has just clocked 28K miles now.
It’s actually the 4th 840Ci Sport that I’ve owned.
I do really like the look of the XJS, actually much more than the E-Type.
I think there must be similarities between the E31 and the XJS but I can’t say which is ‘better’. What I can say though is that in all the BMWs that I have ever owned (and I have owned over 70 over the last 43 years) none have ever felt so ‘expensively’ built!
During my ownership lots of other cars have come and gone ( including E30 M3, E46 CSL, Mercedes Pagoda, Z4M, Alpina Roadster etc) but I have always sold those (perhaps from a financial standpoint unwisely) but I have always kept the 840Ci Sport!
In comparison with a Z4, you couldn't get more ‘chalk and cheese’! The build quality on the E31 is in a totally different Universe! But, with that, also comes the weight! A single door on an E31 feels like it weighs as much as a whole Z4!
Whilst not exactly ‘slow’, they are also not particularly fast cars…especially getting that weight off the mark. The other thing is, you just don’t feel the speed in them because you’re so well insulated from it. Going from 80-100 mph you feel almost nothing!
The brakes take some getting used to too! Again, you feel as if they’re not going to stop you. But that is just the system it uses. In objective contemporary tests an 840Ci would out brake a Porsche Carrera.
They are not ‘complex’ by modern standards as folklore would have people believe. They were at their launch over 35 years ago. But, realistically, they are not really anymore complex than a contemporary V8 E39 or E38.
That said, they are not ‘cheap’ to own in other respects. Any unique to E31 parts are often expensive and some NLA.
Last year, I was doing a re-commissoning on mine and certain bushes are either NLA or only available from specialist manufacturers. One particular bush and bracket was £600!
That said, the ‘look’ is still breathtaking, IMHO. You can only truly appreciate it in the flesh. It’s the scale a proportions of the car, especially when you see it on the move!