Most cars that are seen as “safe and reliable” will have cheap insurance premiums.
A prime example might be a 8 year old Toyota Corolla. It’s not overly sporty, they aren’t expensive to repair, and parts are cheap and readily available.
Any car that is modified, rare, or technologically advanced will have more expensive insurance.
Modified cards are often driven by younger drivers having a hoon, so are more likely to be crashed. They can also be more appealing to steal.
Rare cars, such as a Lotus or Maserati, cost more to repiar and in general are more expensive to own.
And technologically advanced cars also cost more to repiar, since it’s obvious that a car with sensors dotted around the bumpers or in the windscreen will cost more to replace.