Boy, you lot make me smile - going misty-eyed over a pile of BL tat!
Spookily, both the XJS and the C124 ceased production in mid 1996. The XJS was already 12 years old when the 188bhp 300CE was introduced so it is no surprise the 3.6 trounced the MB in 1988 with greater torque, 33 more bhp and costing only £23500 compared the £30100 of the 300CE – before extras!
By 1996 the Jaguar XJS 4.0 was £38950 whilst the E320 Coupe was £42450 – again, before extras which could easily add another £7k. Depending what contemporary tests you read, both cars had pretty similar performance. XJS – 147mph, C124 – 145mph. 0–60 – 6.9/7.6, ave 24.3/25.3mpg.
Of course, by 1996 the Jaguar was a positively ancient cramped two-seater compared to the C124 which is a spacious four-seater and bright inside.
I have driven one of the last 4.0 Celebrations. It’s so claustrophobic you feel your knuckles touching the windscreen when holding the top of the wheel. Fittings and switchgear are just as good as you would expect in a BL car whose roots go back over 30 years.
The two cars were definitely competitors in their day and I concede that today the baroque Jaguar still has that sense of occasion but for driving pleasure and day-to-day practicalities it wouldn’t even come close to a 500/560/SEC, never mind a C124.