RS Turbo
The RS Turbo was launched in May 1990, a year after the XR2i. The engine was based on the 1.6 turbocharged CVH from the Series 2 Escort RS Turbo. Due too lack of space in the Fiestas engine bay, the T3 turbo as on the Escort was replaced with a smaller Garett T2 unit. This also helped to minimize lag as it began to boost at just under 2000rpm. The Bosch K-Star management was also not retained, with Ford utilising the EFI EEC-IV system from the XR2i. The performance of the car was a substantial improvement over the XR2i with 132bhp on tap, 0-60 taking 7.7 seconds and a top speed of 133mph. The Fiesta was geared lower than the Escort, but it did not have the Limited Slip Differential (LSD) and as a result, torque steered a little. The RST's suspension was 1" lower than the XR2i, with shorter dampers on the rear, and the addition of a rear anti-roll bar. The braking system was the same as the XR2i with the option of ABS at extra cost. Externally the RST had 14" three spoke alloy wheels, a colour coded hatch spoiler and the stripe running down the side was green. Too aid cooling bonnet vents were fitted and the grille was removed. Like the XR2i, the RST was only available in Black, Radiant Red, Diamond White or Mercury Grey, although the last production run were all Moondust Silver. The RST was produced until the emission laws of 1992, and as some cars were manufactured, but not registered until after August 1st, there are a few K plate examples around.
Yo físicamente también apostaría por la primera foto (estamos hablando de un fiesta antiguo).
Por lo visto hay un RS Turbo 1600 (luego salio otro 1800) que monta el motor del Escort RS pero cambiandole el turbo por un Garett.
Eso si, me descuadra lo de los 100cv :S
Según dice ahi, andaba por los 132.
Cerca de los 100cv estaban los motores XR2 y XR2i (90 y 110cv).
Lo mejor será verlo y que te saque de dudas.