Question: The BMW 3 Series Compact, which is part of the BMW 3 Series, is what type of car?

Context articles: BMW 3 Series (F30)
BMW 3 Series Gran Turismo
BMW 1 Series (E87)
Joji Nagashima
BMW 3 Series (E21)
BMW 3 Series (E36)
BMW X3
BMW 3 Series Compact
BMW X1
BMW M4

The BMW F30/F31/F34/F35 series is the sixth generation of the BMW 3 Series range of entry-level luxury cars.
 It was launched in late 2011 as the successor to the E90 3 Series.
 The body styles of the sixth generation 3 Series range are:
The BMW 3 Series Gran Turismo (also referred to as "3 Series GT") is the 5-door fastback body style of the 3 Series model range.
 Although it features a rear hatchback, the 3 Series GT is not considered a successor to the 1993-2004 3 Series Compact 3-door hatchbacks.
The BMW E81/E82/E87/E88 is the first generation of the BMW 1 Series range of small hatchback, coupe and convertible cars, which were produced from 2004 to 2013.
 It replaced the 3 Series Compact as the smallest and least expensive vehicle in the BMW range.
 The body styles of the range are:
Joji Nagashima (born 1955; 永島譲二) of Munich, Germany is an automobile designer for BMW.
 Nagashima was born in Tokyo and educated in Japan.
 He is best known for the exterior designs of the E36 and E90 versions of the BMW 3 Series, the E39 version of the BMW 5 Series, and the Z3 Roadster.
 He has been granted 22 patents in car design (as of Nov. 2007).
The BMW E21 is the first generation of the BMW 3 Series compact luxury vehicle and was produced from 1975 to 1983.
 It was initially available as a 2-door sedan, to replace the 02 Series.
 At launch, all models used carburetted 4-cylinder engines, however fuel injected models were introduced in late 1975 and 6-cylinder engines were added in 1977.
 A cabriolet body style - manufactured by Baur - was available from 1978 to 1981.
The BMW E36 series is the third generation of the BMW 3 Series range of entry-level luxury cars, and was produced from 1990 to 2000.
 The body styles of the range are:
The BMW X3 is a compact luxury crossover SUV manufactured by German automaker BMW since 2003.
 Based on the BMW 3 Series platform, and now in its third generation, BMW markets the crossover as a "Sports Activity Vehicle", the company's proprietary descriptor for its X-line of vehicles.
 The first generation X3 was designed by BMW in conjunction with Magna Steyr of Graz, Austria—who also manufactured all X3s under contract to BMW.
 BMW manufactures the second generation X3 at their Spartanburg plant in South Carolina, United States.
The BMW 3 Series Compact is a 3-door hatchback version of the BMW 3 Series, which was produced from 1993 and 2004.
 Initially based on the E36 platform, it switched to the E46 platform in 2001.
The BMW X1 is a compact luxury crossover SUV manufactured and marketed worldwide by BMW since 2009.
 The first generation model, based on the BMW 3 Series, was available with rear-wheel-drive ("sDrive") and all-wheel-drive ("xDrive") configurations.
 The second generation, based on BMW's compact UKL platform, is available with front-wheel-drive ("sDrive") and all-wheel-drive ("xDrive").
The BMW M4 is a high-performance version of the BMW 4 Series automobile developed by BMW's motorsport division, the BMW M GmbH.
 Part of the renumbering that splits the 3 Series coupe and convertible models to the 4 Series (to further differentiate it from the 3 Series), the M4 replaced the M3 Coupe and Convertible models.
 Upgrades over the standard BMW 4-Series include: a very powerful and responsive, twin turbocharged engine; improved handling, suspension, and braking systems; aerodynamic body enhancements; interior/exterior accents with the tri-colour "M" (Motorsport) badging; the significantly reduced weight compared to the standard 4 series and its predecessor with an all-new stiffer chassis and extensive use of carbon fiber, especially the roof of the car.