The following summarizes the technical specification pages from the X180R owner’s manual supplement which was provided with each of the twenty Esprit X180R homologation cars. Interestingly, the “foreword” in each X180R supplement provided with the twenty X180Rs was individually signed by Lotus Chief Engineer Oliver Winterbottom. For some additional detail, some items were updated with information gleened from Winterbottom’s internal draft specification sheet dated October 9, 1990, minus a few options that never made it on the homologation car such as racing harnesses and an oil pan baffle. While not everything detail is listed below, this highlights what makes the X180R truly special compared to other Esprit models.
X180R Homologation Car Equipment
Modified galvanized steel chassis to support fully adjustable competition suspension and high-rate suspension springs
Revised lower link geometry to give zero dive or squat
Strengthened top links with shortened inboard pivots to give increased caster, camber being adjustable via rotating lock washers.
Spring tower strengthened with spring frequency raised 40%
Stabiliser (anti roll) bar tuned for neutral handling, running in solid bushes transmitting roll control via spherical rubber bushes in the modified track control arm.
Monroe shock absorbers with competition valving (revised settings), new rubber mounts and steel retainers.
Steering rack, standard component on higher mounts connects to revised steering arms to control toe characteristics
Ride height reduced
Top links modified to permit camber adjustment
Radius arm mounting bush stiffened 33%
Spring frequency increased 12.5%
Dampers with revised settings and new rubber and steel retainers
Hub carriers remachined to accept revised brake specification
Rear ride height lowered
Additional mount on backbone for the roll cage
Rear spring tower strengthened with roll cage mount