Quote from somewhere,

"The Ford CVH engine (Compound Valve angle, Hemispherical combustion chamber) has been used in many well known Ford models, including Fiestas 1.4, 1.6, XR2I, RS Turbo, Escorts 1.4, 1.6, RS1600i, XR3, XR3i, RS Turbo and Orions 1.3,1.6 and 1600i. This book includes a brief history of this unit followed by hints, tips and advice on rebuilding and tuning an engine in the home garage, describing what can be undertaken by the enthusiast and what should be put out to specialists."

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