Performance Car mag did a full test of the Minker 323 against a BBR 315bhp 4x4 Sapphire back in the early 90s.
It was a Minker 323 they tested.
Both did 0-60 in 4.8 seconds and the Minker did a 100 in 11.6seconds, the Cossie in 11.9.

Minker 323 ss 1/4 in 13.3 @ 107
Sapphire 13.4 @ 109

They summed it up by saying basically that the Cossie was more exciting to drive but they would take the Minker as an everyday road car because of it's stealth factor.