I would like to have a filter. Like you always see on occasion sites. Brand, Model, Fuel, Transmission…
So based on custom meta fields in Custom posts.
Just as an example:

YAMAHA XT 500
7340 euro

Available: 1976–1989 The Yamaha XT 500 is a legendary single-cylinder, four-stroke enduro bike with a 499cc engine producing ~30 hp. Weighing ~140 kg, its lightweight design and rugged reliability made it a trailblazer for off-road riding. A favorite among vintage collectors, it’s prized for its simplicity and durability on tough terrains.
ARIEL WNG
11500 euro

Available: 1940–1945 The Ariel W/NG, a 350cc single-cylinder, four-stroke military bike, delivered ~17 hp. Built for World War II British forces, its robust, no-frills design prioritized durability over speed. Weighing ~170 kg, it’s now a collector’s gem, valued for its historical significance and vintage charm.
NORTON Commando 750
8750 euro

Available: 1967–1973 The Norton Commando 750, a British icon, featured a 745cc parallel-twin engine with ~58 hp. Its innovative Isolastic frame reduced vibration, enhancing ride comfort. At ~190 kg, it offered a top speed of ~120 mph, making it a 1970s performance legend with enduring appeal.
NORTON Commando 850
11250 euro

Available: 1973–1977 The Norton Commando 850, an upgrade to the 750, boasted an 829cc parallel-twin engine producing ~60 hp. Retaining the Isolastic frame, it improved torque and refinement. Weighing ~195 kg, this classic bike remains a favorite for its power and vintage style.
BMW R1200 RT
8250 euro

Available: 2005–2018 The BMW R1200 RT, a premier touring bike, features a 1170cc boxer-twin engine with ~125 hp. At ~270 kg, it offers advanced electronics like ABS and ample storage for long rides. Its comfort and tech make it a top choice for smooth, long-distance touring.
BMW R1200 GS
6500 euro

Available: 2004–2018 The BMW R1200 GS, an adventure icon, uses a 1170cc boxer-twin engine delivering ~125 hp. Weighing ~240 kg, it excels on and off-road with versatile ride modes. Its rugged design and advanced tech make it a global leader in adventure touring.
BMW F800 GS
4000,- euro

Available: 2008–2018 The BMW F800 GS, a middleweight adventure bike, has an 798cc parallel-twin engine producing ~85 hp. At ~210 kg, it balances agility and off-road capability. Ideal for versatile riders, its manageable size and performance suit varied terrains and adventures.