Below is a link to the website JG Parry-Thomas who was Chief Engineer at Leyland and is credited with designing the Leyland Eight. Scrolling down the website page there is a good article and diagrams of the Leyland Eight from the book Leyland Eight by Hugh Tours.
JGParry-Thomas was a World Land Speed Record holder and fervent racing driver at Brooklands after leaving Leyland. Well worth reading about.
I came upon this story after reading the book 'The Fast Set' by Charles Jennings. Published by ABACUSbooks 2004.
Reid Railton was a prominent motor designer who worked at Leyland with JG Parry-Thomas at the time. Railton moved on to work on Sir Malcolm Campbells Bluebird and John Cobbs cars and speedboats before moving to America.
click here to go to the JG Parry-Thomas website www.parry-thomas.co.uk
References; See page 1 of Leyland History - click here.