It used the 955 cc straight-three engine similar to those found in the contemporaneous Speed Triple and Daytona models, only slightly detuned for smoother power delivery.

An engine revamp with the assistance of Lotus in 2002 increased output to 118 bhp (88 kW) at 9100rpm and 100 N⋅m (74 lbf⋅ft) of torque at 5100rpm from a lighter engine—the bike is 207 kg (456 lb) dry.

In 2005, Triumph introduced a redesigned Sprint ST based around the same inline triple, increased in stroke to yield a displacement of 1,050 cc (64 cu in) and with a new fuel injection system.

[4] Compared to the class-leading ST (Sports Tourer), the GT was more focused on two-up touring, with a longer wheelbase, more weight and a better pillion provision.

The highest gear was made 7% taller than the ST to allowing for more relaxed highway cruising, giving an engine speed at a steady 110 km/h (68 MPH) of just over 4,000 rpm.

The GT has changed little since its introduction in 2010, although a new SE Special Edition included as standard previously optional accessories such as a gel "Comfort Seat".

[5] Motor Cycle News called the pre-2005 Sprint a "superb British all 'rounder which pipped Honda’s VFR800 simply by using a straight bat when the VFR tried all kinds of trick but ultimately unnecessary technology".