Complex sentence: Power and torque figures were rated at and, respectively, while the Statesman's optional V8 was the version from the WK Caprice, with the WL Caprice's engine obtaining a further.
Split into simpler sentences: Power and torque figures were rated at and, respectively. The Statesman's optional V8 was the version from the WK Caprice, with the WL Caprice's engine obtaining a further.