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1.6L 8v - 807 727
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1.6L 8v - 807 727
Forged pistons for Renault 1.6L 8v 807.727: Bore 77.00mm, Compression ratio 8.6:1, Pin 21mm, Pin height 41.00mm. Range WOSSNER, dome 0-0.5. Compatibilities and Original vehicles (Renault 18 Turbo 109 hp).
On the 807 727 the answer comes down to one reference: WÖSSNER forged pistons at the standard 77mm bore, calculated for an 8.6:1 compression ratio. That low figure is no accident, it marks a boosted version of the 1.6-litre 8-valve block, where compression is dropped to leave room for boost pressure. The logic is the opposite of the page 1.6L 8v - 807.12, which offers four bore sizes from 77 to 80mm to follow rebored blocks without lowering compression. One size here, one clearly defined use.
