on a straight with std zr and zs the acceleration would be virtually identical. 0.1 seconds difference from 0-60 and proberly not alot more difference from 60-100.
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Astra GSi turbo
Regal Autosport Astra GSI Turbo 304 bhp 356 lb/ft
Thorney motorsport Vectra vxr 305bhp 398lbft
Now its time to build a big turbo MG ZS
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