Hello, everyone starts out somewhere at one point, right? No need to be ashamed.
Of course there's all types of engines and chassis.
Toyota Supra MKIV uses the 2JZ motor, and the Skyline BNR34 GT-R uses a RB26DETT.
They are both Inline 6 motors (I6), in which the piston configuration of the car is a straight block. It's not a V shaped like a V6, hence the V in the name. Also, since they're both Japanese cars, they have different specifications in Japan and in the United States because of different safety and emission laws.
Usually, but not always, the Japanese version of the motor (JDM) is stronger just slightly, because of less strict emission and car laws.
Imports (Japanese) are indeed great street racing cars because of the wide variety of parts for the car.
A tuner and ricer are two different things, but many people get these two mixed up.
A tuner is a person who tunes imports for whats inside the engine and the suspension. They tune the engine and put in different parts to see how it effects the performance. They also tune the suspension so make sure it's right for the street or track. (Camber, Toe, Stiffness etc)
A ricer is the opposite, in which they basically add unnecessary body-kits and rims that do not affect the performance of the car in anyway. It is basically for looks and usually they dont know what they're doing.
US 2JZ:
320 hp
315 ft/lb
540 cc
Low Impedance
233 deg
In Open 3 BTDC, Close 50 ABDC, Ex Open 52 BBDc, Close 4 ATDC
8.25mm
Airflow sensor
JDM 2JZ:
280 hp
323 ft/lb (1997 VVTi 338 ft/lb)
430 cc
High Impedance
224 deg
In Open 3 BTDC, Close 41 ABDC, Ex Open 52 BBDc, Close 4 ATDC
7.8mm
MAP sensor
RB26DETT (JDM only)
Displacement: 2568cc
Horsepower: 277 bhp @ 6800 rpm
Torque: 293 lb-ft @ 4400 rpm
Combustion Chamber: Pent Roof Type
Valve Arrangement: DOHC Belt Drive
Bore x Stroke: 3.386in x 2.902in
Compression Ratio: 8.5:1
Compression Pressure: 171 psi / 300 rpm
Dimensions (L x H x W): 34.25in x 26.18in x 26.57in
Idle Speed: 950rpm
Ignition Timing: 20deg BTDC / 950rpm
Engine Oil: 7.5W - 30 or similar
Oil Pan Capacity: 4.5 L, 4 imp qt
Oil Filter Capacity: Approx.0.4 L, 3/8 imp qt
Engine Coolant Capacity: Approx. 9.0 L, 7 7/8 imp qt
To find out more information, your best bet is to just google these engine names and read on car forums. You will learn more in time, trust me.