BMW Just 4/2 (Z21) concept (1995)
Concept car · 1995 · Combustion
A motorcycle-engined featherweight roadster before the Ariel Atom.
The Z21 'Just 4/2' was a stripped-back, minimalist two-seat roadster shown at the 1995 Tokyo Motor Show, predating the Ariel Atom's exposed-frame ethos by years. Built on a lightweight aluminium frame with Kevlar panels, it weighed just 550 kg. Power came from a rear-mounted 1.1-litre four-cylinder engine borrowed from the K1100 motorcycle, good for 100 hp and a 0-60 mph sprint of roughly six seconds.
Key facts
- Engine: 1.1L 4-cyl from BMW K1100 motorcycle, rear-mounted
- Power: 100 hp
- Weight: approx. 550 kg (1,212 lb)
- 0-60 mph: approx. 6 seconds
- Top speed: over 177 km/h (110 mph)
- Construction: Aluminium frame, Kevlar panels
Production
- Status: Concept only
- Z21 concept only - never produced.
- Revealed at 1995 Tokyo Motor Show
Source: NetCarShow