featured a cast-iron block, cast iron cylinder head with 2 valves per cylinder and a single overhead cam driven by a timing belt. The XR4Ti engine also received a Garrett AiResearch turbocharger, fuel-injection and Ford's EEC-IV engine control unit. Built in Ford's Taubaté Brazil plant, the engine had a bore of and stroke of for a total displacement of . A nearly identical engine was used in the 1983 Mustang Turbo GT and 1983 Thunderbird Turbo coupe. The XR4Ti did not have the intercooler found in the 1984 SVO Mustang or 1987-88 Thunderbird Turbo coupe. Engines in cars equipped with automatic transmissions had maximum boost set to and produced . In cars with manual transmissions maximum boost was raised to and the ECU programming was modified to allow the engine to produce . The second-order vibrations produced by this large four cylinder engine had been noticeable when it was used in the turbocharged Thunderbird and Cougar models. To minimize these in the XR4Ti without resorting to extreme measures such as adding balance shafts, extensive work was done to reduce noise, vibration, and harshness (NVH) in the power-train. The first measure taken to reduce NVH was to redesign the engine's external components, including the intake manifold, to increase the stiffness of the bracketing and lighten the components. The second measure was to reduce the amount of vibration transmitted to the body structure by using soft rubber engine mounts. Engine roll was controlled by wide-based mounting brackets and engine movement due to bumps was limited by having the brackets attached to the body via hydraulic mounts. The base transmission was a 5-speed manual Ford Type 9 unit, while a Ford C3 3-speed automatic transmission was optional. Options, updates, special editions The XR4Ti arrived on the market with an extensive list of standard and optional equipment. 1985: Standard equipment includes flush headlamps, variable ratio power steering, power mirrors, power disc brakes, nitrogen-pressurized shock-absorbers. Interior equipment includes air conditioning, a 60/40 folding rear seat, and an AM/FM stereo with integrated cassette player. A manual transmission is standard and an automatic is optional. Most cars are equipped with manuals. Tires are Pirelli P6 195/60HR14 fitted to 14-inch 8-hole "phone dial" alloy wheels. Other features, like power windows, power door locks, cruise control, leather seats, heated front seats, manual moon-roof, and metallic paint, are extra-cost options. Many changes were made to the car over its five-year