Quanto a estrutura de ambas (IO e TR4), veja este site, mostra os códigos das partes:
http://www.akadia.ru/_pages/mitsubis...01MDAxOTYuanBn
Achei bem legal para quem precisa dos códigos das peças.
Mais informações sobre a IO:
"The front axle on both models is an automatic freewheeling type that allows four-wheel drive to be selected at speeds up to 100 km/h, and the five-door model is fitted with a limited slip rear differential as standard.
Power assisted front disc brakes coupled to rear drums and a pressure control valve, provide the iO's basic but adequate stopping power.
McPherson struts and coil springs with radius rods and an anti-roll bar form the front suspension, while the rear is a five-link trailing arm set-up with coil springs on a solid axle. Mitsubishi claim to have engineered the suspension to give the best compromise between off-road and on-road comfort. Power assisted rack and pinion steering is standard on all models.
The iO does not have a full chassis, but is based on a monocoque body shell where all body members, floor panels, turret and door pillars are integrally welded together. The impact absorbing zones that are built into the front and rear of the body, plus a driver's airbag and adjustable anchor points on the front seatbelts, form its major safety features. Fire retardant materials are used throughout the interior of the cabin. Passenger airbags are not available for the iO. An electronic engine immobiliser and a keyless entry system are the main security components giving the iO a theft rating of 76."
Fonte:
http://www.mynrma.com.au/cps/rde/xch...car_review.htm
Mais:
"Unlike most larger four-wheel drives which feature a rugged ladder chassis, iO utilises monocoque construction with car-like front and rear crumple zones. Two sizeable chassis rails form part of the floor pan and run the length of the vehicle giving it a solid platform.
Suspension consists of McPherson struts with coil springs up front and a five-link rigid rear axle with coil springs. Long suspension travel ensures off-road efficiency. The suspension soaks up corrugations and pot holes with no sign of the vehicle deviating from a straight line. The ride is smooth, supple and confident on most surfaces. However, the rear suspension does have a tendency to bottom out on larger bumps with four adults on board.
Some critics have labelled the 1.8-litre engine as not up to the task. But when tested, the iO - with fuel consumption around 10 litres/100km - did everything with relative ease. Its off-road ability certainly makes up for any perceived lack of power."
Fonte:
http://www.policejournalsa.org.au/9910/26a.html