From 1998 to 2004, the Japanese automaker Daihatsu produced a supermini/subcompact vehicle, called Daihatsu Storia. In some markets, it was also marketed as Toyota Duet. The Storia took the place of Charade that was discontinued in 1999; however, before being ceased it was produced for almost a year alongside Storia.
Except for Japan and some other countries, the Storia was marketed as the first generation model of Sirion.
The first production model of the Storia or Duet appeared in 1998 which was offered with two petrol engines with multi-point fuel injection including a 1.0-L 3-cylinder generation 54 bhp (40 kW; 55PS) and a 1.3-L 4-cylinder producing 86 bhp (64 kW; 87 PS). Both the engines were mated to either a 5-speed manual transmission or a 3-speed automatic gearbox. The 1.3-L models were upgraded in 2001 so as to achieve 102 hp (76 kW; 103 PS) which could sprint from 0 to 60 mph in 9.6 seconds with a top speed of 111 mph (179km/h). This engine was not only powerful but also very fuel efficient that offered an average rating of 49.6 mpg and the 1.0 model averaging 51.4 mpg.
Two Rally versions of Storia or Duet were also offered, i.e. the Rally 2 and the Rally 4. The Rally 4 was offered as a four wheel drive. the engine performance of the Rally models were better than the regular models as they offered 108 bhp (81 kW; 109 PS) and sprint from 0 to 60 mph in 8.1 seconds with a top speed of 115 mph (185 km/h). The 4Track (or 4WD outside Japan) was a four wheel drive version equipped with 1.3-L engine as standard. The F-Speed model was another model offered that came with Formula-1 style paddle gear changers. In Japan, Storia X4 model was also launched powered by an engine with an output of 120 PS (88 kW; 118 hp).
The Storia/Duet received extensive redesigning in 2000, particularly the front of the car with prominent new grille design. Going back rearward from A-posts, the design remained almost the same. On the interior, the dashboard received some new treatment and the whole interior was given much more luxurious looks than before.
Until 2001, the only version offered in Australia was powered by 1.0-L when the new sporty 1.3-L model, called the GTvi was added to the Storia lineup of Australia. The GTvi was equipped with a powerful naturally aspirated motor capable of generating 101 bhp (75 kW; 102 PS) at 7500 rpm. This particular model version was often referred to as Toyota Duet.
The Storia/Duet was redesigned once again in December 2001. The new redesigned model featured a new sportier front grille, a completely redesigned dashboard with more storage space and easily manageable controls. In 2002, this particular edition was exported to the European and Australian markets as Sirion.