These vehicles feature new design cues which derive from the L-finesse philosophy of “Intriguing Elegance”Incisive Simplicity,and “Seamless Anticipation.New vehicle technologies include advanced instrumentation, multiple driver-selected vehicle configurations, hybrid and experimental powertrains, and unconventional driver interface designs.The first concept vehicle of the LF Series, the LF-X, appeared in 2003. Several of the LF concept vehicles have appeared close to their production counterparts, while the design cues of other LF concepts appeared on more distinctly different production vehicles.

The LF-A is a 2-door exotic concept car built as a prospective halo car for the Lexus division. Three versions have been shown, the first debuting at the 2005 North American International Auto Show (NAIAS), this concept was about five inches shorter than the Porsche 911 Turbo (996) with a wheelbase about nine inches longer, it was nearly 48 inches (1,200 mm) in height about equal to the Ferrari F430 with a width of 73.2 in (1,859 mm). It was powered by a V-10 engine displacing less than 5.0 liters, generating over 500 hp (373 kW) and had a top speed around 200 mph (320 km/h).

The best lap time of 9:06 on the 24,4 km version was about 40 secs slower than the best Porsche GT3-RSR, and about on par with Cup-GT3. This resulted in finishing 77th[16] overall among over 200 teams. Lexus also took part in the 24 Hours Nürburgring [17] on 24/25 May 2008, with four Japanese drivers including Akira Iida leading the team. The LF-A was involved in a crash just prior to the race and was hurriedly repaired in two hours to make the race.[18] As car #14, [19] it qualified 27th[20] among 223 cars, and finished 7th in the SP8 class of 11 entrants, and 121st overall, with a best lap average speed of 163 km/h (101 mph), compared to 175 km/h (109 mph) of the fastest cars.

The Lexus LF line is a series of concept cars built by Lexus, the luxury vehicle division of Toyota Motor Corporation. The “LF” line utilizes L-finesse, a specific design direction by Lexus. The design language of L-finesse was first introduced on the LF Series concepts and has now extended to all new vehicles in the Lexus lineup. The LF Series vehicles include three coupes/convertibles: the LF-A, the LF-A Roadster, and the LF-C; two sedans: the LF-S and LF-Sh; and two crossover SUVs: the LF-X and LF-Xh.

European luxury marques, the Altezza/IS was designed with a greater performance emphasis than typically seen on prior Japanese luxury vehicles.The design received critical acclaim at its 1998 launch, and was awarded Japan’s “Car of the Year” honor for 1998-1999. A year later, Lexus began marketing the IS equivalent models in Europe, and the IS debuted in the U.S. as a 2001 model.

The IS was introduced as an entry-level sport model slotted below the ES in the Lexus lineup (and outside of North America, the Lexus GS). The IS was originally sold under the Toyota Altezza (the word “altezza” is Italian for “noble”) nameplate in Japan until the introduction of the second generation Lexus IS design. The Altezza name is still used at times to refer to chromed car taillights like those fitted to the first generation model, known as ‘Altezza lights’ or ‘Lexus-style’ lights.