Toleman TG184 Hart Turbo Toleman Group Motorsport No. 20 Johnny Cecotto USA GP 1984 Tecnomodel 1:18

The 1984 Toleman TG184 is one of the most consequential backmarker chassis in Formula 1 history, yet the number 20 car — assigned to Johnny Cecotto for the entire season — remains far less documented than its number 19 partner. This Tecnomodel limited-edition 1:18 scale model fixes the car precisely at Round 9: the Dallas Grand Prix, Fair Park, 8 July 1984, in the team's blue, white, and red Toleman Group Motorsport livery.

The TG184: Rory Byrne's Carbon Fibre Formula 1 Machine

Designed by Rory Byrne and Pat Symonds, the TG184 debuted at the 1984 French Grand Prix at Dijon-Prenois and represented a significant step for the Witney-based constructor. The carbon fibre monocoque carried double wishbone suspension with pull-rod front and push-rod rear geometry, on a 2,800 mm wheelbase. Power came from the Hart 415T — a 1,459 cc straight-four turbocharged unit producing approximately 600 bhp in race trim — driving through a Hewland five-speed manual gearbox. Kerb weight was approximately 540 kg. The car measured roughly 4,500 mm in overall length.

Fair Park, Dallas: The Last Race of a World Champion

The 1984 Dallas Grand Prix used a temporary street circuit at Fair Park notorious for surface deterioration throughout the day. Cecotto qualified 15th with a time of 1:40.027 and completed 25 laps before spinning off, classified 18th. The race was won by Keke Rosberg in the Williams-Honda. What gives this particular entry its collector weight is what followed: weeks later, in British Grand Prix practice at Brands Hatch, Cecotto broke both ankles in a crash and never started another Formula 1 race. Dallas was his final start. Before Formula 1, he had been FIM 350cc and Formula 750 Motorcycle World Champion — a crossover career without parallel in the sport.

Tecnomodel Mythos Collection: Resin at 1:18

This model is part of Tecnomodel's Mythos Collection, a four-SKU TG184 series covering the British GP, Portuguese GP, Dallas GP, and Italian GP practice — all rendered at 1:18 in resin. Resin construction allows Tecnomodel to reproduce the aerodynamic surface complexity of 1980s turbocharged Formula 1 cars without the tooling compromises of diecast. The livery replicates the blue, white, and red scheme carried by car number 20 at Dallas. The edition is listed as limited.

In the Display Cabinet: 25 cm of 1984 Formula 1

At 1:18 from a real-car length of approximately 4,500 mm, the model measures 25.0 cm — compact enough for a standard single-car shelf but sufficiently detailed to hold its own alongside other Tecnomodel Mythos pieces. The natural pairings are the three companion TG184 models in the same series, or a 1:18 representation of the 1984 McLaren MP4/2 to contextualise Toleman's achievement against the season's dominant car. For collectors tracing Cecotto's career, it sits at the precise boundary between his motorcycle championship years and the touring car era that followed his recovery.