Storm force

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

Diesel power for the Dis­cov­ery 2 came from a brand-new en­gine, which Land Rover called the Td5. Con­tin­u­ing the metro­log­i­cal theme, its de­vel­op­ment pro­gramme was co­de­named ‘Storm’, and it be­gan life as a mem­ber of a fam­ily of en­gines de­signed to re­place Land Rover and Rover cars power units. The fam­ily was a de­vel­op­ment of the ‘Prima’ range of en­gines used in Rover cars and the Free­lander, and was based around a 500cc per cylin­der mod­u­lar de­sign. Ap­proved in 1993, it sur­vived for only a few months be­fore BMW ac­quired Rover. Only the five-cylin­der ver­sion sur­vived the en­counter, there be­ing no suit­able equiv­a­lent in BMW’S power-unit sta­ble. It was in­no­va­tive in us­ing elec­tronic unit in­jec­tors (EUIS) be­cause com­mon-rail tech­nol­ogy was then not thought to be suf­fi­ciently ma­ture. Each cylin­der had a dig­i­tally matched EUI that in­jected fuel at ex­tremely high pres­sure for max­i­mum con­trol. The con­trol unit, co­de­named ‘Thun­der’, was de­vel­oped in-house and pro­vided a vari­ably sen­si­tive elec­tronic throt­tle con­trol. Ser­vice­abil­ity was key, with an­other in­no­va­tion in the form of a cen­trifu­gal oil fil­ter al­low­ing 12,000 miles (20,000km) be­tween oil changes while a mi­cron-fine fil­ter and re­turn fuel cooler pro­vided the clean, cool fuel de­manded by the EUIS.

The five-cylin­der Td5 en­gine was the re­sult of a ma­jor de­vel­op­ment pro­gramme that be­came one of the most well-re­spected and re­li­able of Land Rover power units.

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