My guess is that you are a miner.

Because only a miner would say "more tedium please!"

bigger engines means bigger thrust which means higher speed.

In space, a vacuum, zero gravity.. any object subjected to a constant thrust of 'x' will accelerate at 'y' speed. any object with 1n of thrust would reach a speed factor of 1 after a period of time and continue accelerating at a factor of 1 at the same rate. It will keep accelerating at a speed factor of 1 until an opposite force slows it or stops it.

A small vehicle, say car size, frigate size (whatever) would have a propulsion size unit limitation. it is reasonable to assume size to output, so something small would have a power plant limiting it to x thrust. In an example something the size of a frigate would have a relatively small power drive.

Something the size of a Fenrir would have a power drive considerably larger, so you can assume the engine capability of a Fenrir would output 100n, so therefore would be able to reach a speed factor of 100 the same time a small ship with 1n of thrust would reach a speed factor of 1.

In eve terms, a speed factor of 1 may be equivalent of 1 AU/s, and a speed factor of 100 is 100 AU/s.

In space, an object regardless of it's size will reach x speed if y force is applied to it with acceleration factors with mass and momentum, but it will absolutely reach x speed after a given time. Put 1n of thrust on a fenrir, or a magnate, they will traverse space at the same rate. A fenrir would be able to field much bigger, more powerful engines, therefore instead of 1n of thrust would have an output of 100n of thrust, obviously meaning it's capable of a speed factor of 100 in the same given time. 100x greater that of the frigate.

One thing to remember in space is that there is no drag, so in theory you'd need to exert thrust for half the journey and reverse thrust for the last half.. otherwise you'll find yourself over shooting your destination horribly. This 50 / 50 acceleration / deceleration applies to everything. It's probably possible to reach crazy speeds with continuous thrust, as you would be accelerating all the while your engines are engaged at whatever thrust is being output. It's counter-productive unless you just want to throw your ass into unknown space an an almost unfathomable velocity.

So how in EVE an object with a gigantic power plant with massive amounts of thrust is slower than a tiny object with a seriously smaller power plant is unknown. I have no explanation unless someone turns around and says, EVE space is actually water, and we're all flying submarines; in which case it all the physics start to become more understandable, and mass starts to influence drag, and therefore smaller pointy ships should go in theory go faster than pianos with engines.

.. and comparing a hippo to a rabbit isn't a valid comparison, it's not like for like, unless folks want to believe rabbits and hippo's are similar. In real life big things have bigger muscles, bigger bone structures that allow them to cover ground more quickly than their smaller counterparts. It's why someone who's 4ft'8 would never win a running race against Usain Bolt, there's lots of reasons why. Exception being birds, as they're all build differently and different species wrapped into the same 'family'. Huge birds grip currents much differently than smaller birds, and are designed to negotiate various factors generated by the earth. Although noted that one of the falcon species is the fastest known animal on the planet as it's learned to use earths gravity to reach almost terminal velocity. Alas doesn't apply to space faring antics.

But digression aside, either we're all 'flying' submarines, or simply "wizards did it and don't question it" rules apply.