Thor’s ham­mer

LRO (UK) - - Heritage | How The Disco 2 Was Born -

06The D2’s petrol en­gine was a ma­jor up­grade of the al­loy V8; its de­vel­op­ment pro­gramme was co­de­named ‘Thor’. It had the 3950cc ca­pac­ity of ear­lier deriva­tives, now known as the ‘4.0-litre’.

A big vis­ual dif­fer­ence was a change to the in­let man­i­fold. The orig­i­nal pent­house was re­placed by a mul­ti­ple long-tract ar­range­ment de­signed to im­prove torque, an in­crease of nine per cent be­ing claimed over a wider rev range. The BMW in­flu­ence was re­vealed in the new Bosch Motronic en­gine man­age­ment sys­tem while two twin ig­ni­tion coils fed a new set of dou­ble-plat­inum spark plugs.

Re­fine­ment was im­proved by spec­i­fy­ing cross­bolted main bear­ing caps and a struc­tural cast al­loy sump. A new front end with mul­ti­ple V-belts ac­com­mo­dated the wide range of an­cil­lar­ies in­clud­ing a more pow­er­ful al­ter­na­tor, an air­con com­pres­sor and the ACE pump.

Not all the changes to the Thor V8 were un­der the skin – it was vis­ually dif­fer­ent with a new, long mul­ti­ple-tract in­let man­i­fold, a new front end and a new cast sump.

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