The suspension and steering of the MGF and MG TF represent the single greatest mechanical distinction between the two models, and the most important consideration when ordering replacement components. The MGF uses the Hydragas interconnected fluid-and-gas suspension system with double wishbones at both ends, while the MG TF replaced this entirely with conventional coil springs and telescopic dampers, retaining the front double-wishbone layout but introducing a completely new multi-link rear axle. No suspension components are interchangeable between the two systems, and the front and rear subframes are model-specific to accommodate the different architectures. Always confirm model (MGF or MG TF) as the first step when ordering any suspension item.
MGF Hydragas Heritage
The MGF's Hydragas system traces back through Alex Moulton's work on the Austin Allegro (1973) and further back to the Hydrolastic suspension of the 1959 Mini and the BMC 1100 of 1962. In the MGF, front and rear Hydragas displacers on each side of the car are interconnected by fluid-filled pipes, with nitrogen gas providing the springing medium. The interconnection delivers inherent pitch control, resisting nose-dive under braking and squat under acceleration, and produces the notably supple ride quality that distinguishes the MGF from more conventional sports cars. Hydragas displacers are no longer manufactured, Dunlop destroyed the tooling around 2001, so existing units' condition is one of the key ongoing MGF ownership considerations.
Re-pressurisation services and coil-spring conversions are available paths for MGF owners whose displacers have failed.
MG TF Re-Engineered Suspension
The 2002 transition to the MG TF brought a complete re-engineering of both ends of the car. The front retained double wishbones but adopted revised geometry (reduced camber, parallel tracking in place of the MGF's toe-out, stiffer anti-roll bar), while the rear was redesigned from first principles as a coil-spring multi-link axle. The approximately 20% stiffer MG TF bodyshell and solidly-mounted subframes contributed to more precise wheel control and the sharper turn-in response that characterises the TF's on-road feel compared to the more compliant MGF. Production MG TFs were revised again at VIN 5D639631 with softer damper and spring calibrations to address criticism of the 2002 to 2004 car's firm ride, a breakpoint worth identifying when ordering spring and damper parts.
Steering, EPAS Across Both Models, But Different Specifications
Both the MGF and MG TF use electric power-assisted rack-and-pinion steering (EPAS) rather than a hydraulic power steering pump. The MGF 1.8i did not gain EPAS as a standard fit until the start of the 1998 model year (mid-1997 production), with VVC models having had it from launch. From the MY2000 facelift, an adjustable steering column was introduced on the MGF. The MG TF carried over EPAS and the adjustable column as standard across all variants.
The MG TF steering differs significantly from the MGF in one respect: the steering rack is 'quickened' by 10%, reducing lock-to-lock from 3.1 turns (MGF) to 2.8 turns (MG TF) with an overall ratio of 17.5:1. This faster gearing is one of the most immediately noticeable differences when driving an MG TF back-to-back with an MGF, and the steering column and rack components are not interchangeable between the two models. Both models share the same turning circle of approximately 10.5 metres kerb-to-kerb.
Five Child Pages
Front Suspension covers the front springs, dampers, Hydragas displacers, and interconnecting pipe assemblies, the springing and damping items for each front corner. Wishbone arms and hub components are covered under the separate Hubs section. Rear Suspension covers the rear springs, dampers, Hydragas displacers, and the rear pipe assemblies (including the MGF VIN YD517619 rear LH pipe production change), the springing and damping items for each rear corner. Steering covers the complete steering system: steering rack (MGF and MG TF variants), rack mounting components, steering column with adjustable-reach mechanism, inner and outer tie rods, track rod ends, and the EPAS motor and associated wiring.
Subframe covers the front and rear subframe assemblies (distinct for MGF and MG TF), their mounting rubbers and solid mountings (MGF Trophy and all MG TFs use solid front mountings; standard MGF uses rubber front mountings), and the associated brackets, bolts, and subframe braces.