ASK QUENTIN

Aspirational dilemma

I have a Porsche 993 Cabriolet manual with 74k and a 2004 996 Tiptronic with 36k, both in superb condition. But I have always promised myself an E-type. However, over the last two years my cars have increased in value while the Jag has remained relatively static. Should I wait longer to increase my buying power? Andy Baguley

E-type prices have softened considerably over the last few years, so the finest restored or original cars are much better value – but in time, prices for this enduring icon will strengthen again. Watch the market, study the variants, drive them all, then search for the rarest model in the best, forensically detailed and correct condition to find the E-type you really like and that will be a solid investment. Quentin Willson

Sell the BMW or Merc?

My 61-plate Mercedes Benz E Class Coupé E500 Blue Efficiency Sport Edition 125 is a relatively rare car, I was led to believe, because it has a 4.7 turbo V8, instead of the 5.5 normally aspirated V8s. I also drive a 62-plate petrol BMW 535i. While the BMW is cheaper to maintain, will the Mercedes be more inclined to appreciate? Pieter de Lange

I’d sell the Mercedes, they’ve never really become that coveted. The 535i has become a bit of a legend in its own right and is a really quick, supple, capable machine. I’m not sure either will be a sound investment, but the BMW should depreciate less.

Quentin Willson

Keep the Porsche or the Jag?

I have a 1995 Porsche 928GTS auto with 46k miles and a 1994 Jaguar XJS V12 6.0-litre convertible with 32k. One has to go but which has the better chance of appreciation in the medium to long term?

I also have a 2002 Mercedes SLK32 AMG with 44k miles. Does it have much of a chance of appreciation? Mark Green

The medium to long term financial appreciation of the Porsche is likely to be greater than the Jaguar. Now is a good time to sell the XJS. The SLK32 AMG is a wonderful pint-sized weapon and still has some appreciating to do, so hang on to that. Quentin Willson