And now for a snippet from google: "The original ramp is a metal structure with a 20-degree slope that is used to measure a vehicle's ability to conform to the terrain. Suspension travel and chassis flex are two important qualities needed to traverse uneven' date=' rutted terrain, and the ramp is a fair, controllable, and repeatable way to measure them. There's no room for driver error or luck to influence the outcome; a number achieved on the ramp is directly comparable between different vehicles, any day, anywhere in the world. Ramp Travel Index is an accurate way of telling how far up the 20-degree ramp a vehicle can go, while still keeping all four tyres in contact with the surface. To some extent, mathematical manipulations are necessary; it would be unfair to ask a short-wheelbase vehicle to crawl as far up the ramp as one with a long wheelbase. Therefore, whatever number of inches a vehicle can muster before it runs out of suspension travel (and chassis flex) is divided by its wheelbase. (This way, a 130 can indeed compete with a 90 We multiply that number by 1,000 to get kind of a workable value. For example, if a 110-inch-wheelbase vehicle goes 52 inches up the ramp, its RTI number would be 472 ([52 ? 110'] x 1,000). Obviously, a higher RTI number translates into better conformability to the terrain. A perfect score would be 1,000, indicating that the vehicle can go as far up the ramp as its wheelbase is long without lifting a tyre. No standard vehicle has reached 1000 but Range Rovers come close. A few modified machines have indeed reached the perfect score and beyond." Thus RTI= Off road capabilitiesand so: RTI of Range Rover 703 RTI of Land Cruiser 590 RTI of Hilux 395 There is just no way to argue with stats, is there?
