A subcompact or supermini vehicle, the Daihatsu Storia was launched by Japanese automaker Daihatsu in 1998. The vehicle remained in production until 2004. In some markets the Storia was also marketed as Toyota Duet. The Storia was a replacement vehicle for the Charade, though both were sold alongside each other for almost a year before the Charade was completely discontinued in 1999.
Except for Japan and some export markets, the Storia was marketed as Sirion’s first generation.
The embodiment of the Storia/Duet also known as Sirion in some export markets was introduced in 1998 with a choice of two multi-point fuel injection engines, i.e. the 1.0-L 3-cylinder delivering 54 bhp (40 kW; 55 PS) and the 1.3-L 4-cylinder delivering 86 bhp (64 kW; 87 PS). The transmissions offered were a 5-speed manual and a 3-speed automatic gearbox. The 1.3-L models were available from 2001 and the engine was capable of generating 102 hp (76 kW; 103 PS) and could sprint from 0-60 mph in 9.6 seconds with a maximum speed of 111 mph (179 km/h). The 1.3-L versions were very fuel efficient with an average rating of 49.6 mpg, while the 1.0-L versions had an average rating of 51.4 mpg.
The company also introduced the two Rally versions of the Storia/Duet, i.e. the Rally 2 and the Rally 4. The Rally 4 was available with all-wheel drive layout. Compared to standard models, the engine power was boosted for the Rally versions, i.e. 108 hp (81 kW; 109 PS). The rally versions could sprint from 0-60 mph in 8.1 seconds (8.9 for Rally 4). The maximum speed attained by Rally versions was 115 mph (185 km/h). In export markets, the 4Track or simply 4WD model was offered as 1.3-L’s all-wheel drive variant. Later, the F-Speed model was launched featuring Formula-1 style paddle gear shifters. Japan also saw the release of another model called the Storia X4 featuring an engine with an output of 120 PS (88 kW; 118 hp).
In 2000, the front of the Storia received some redesigning of which the most prominent was the grille design. However, the designed remained almost the same from A-posts rearward. In the interior, the dashboard received some radical treatment and was made more luxurious than before.
Up till 2001, the Australian market received only 1.0-L version, while the 1.3-L version, called the GTvi was introduced later in the range. In the entire range, the GTvi possessed the most powerful naturally aspirated motor capable of delivering 101 bhp (75 kW; 102 PS) at 7500 rpm. It was also marketed under Toyota Duet nameplate.
The Storia/Duet was again redesigned in 2001. This time the front grille was altered to give extra sportier appearance. The silver accents on the sides were dropped in some export markets. The dashboard once again received some additional treatment. The controls were made easier and the storage space was increased. In 2002, this version was launched in Australia and Europe under Sirion nameplate.