I rather like this car. It's very well designed with a slightly understated look but with lots of elegance and some voluptuous lines. Even though the Dino coupe isn't rare lot's of people don't recognize it and since only recently interest in this model is picking up (slowly). Current value of this model is modest: less than half of that of the spider. It's very affordable, but remember: it has very sensitive mechanics and parts can be hard to come by.

The reliability problems of the race-bred aluminum 2-litre V6 unit lead to its replacement in 1969 by a new 2.4 litre cast-iron V6 engine developed by Fiat. Both the Dino spider and the coupe were fitted with this unit, as well as the (Ferrari) Dino 206 GT, now named the 246 GT. This engine was developed parallel to the one fitted in Fiat's new luxury sedan, the 130, a 2.9 litre V6 introduced that same year yet remarkably different in design.
The body shape and measurements of the Dino 2400 models remained largely the same (though many panels were revised). The 2.4 litre spider is hard to identify, most notable are the revised grill (black with 2 horizontal chrome bars instead of the original metallic grid-type grill) and the "Dino 2400" badges on the rear next to the license plate holder. Another characteristic mark is the relocation of side-lights on the front wings, they were moved from behind the front indicator lights to behind the front wheels, incorporated into the horizontal "Fiat Dino" badges.

The new engine was heavier than the old one, but its increased power output and reliability more than made up for that. It offered a 2418 cc displacement and 180 hp @ 6600 rpm, which made a top speed of over 210 kph available to the spider. The weight of the spider model grew from 1150 kg to 1240 kg.
With the 2.4 litre model the Ferrari transmission was replaced by a more robust 5-speed ZF transmission, now with regular sump lubrication, but it retained the original Ferrari shifting pattern (1st gear bottom left, higher gears in H-pattern with 4th and 5th opposite to each other). Also the rear suspension became fully independent with anti-roll bar and 2 instead of 4 shocks, a system adopted from the Fiat 130 sedan.

Other significant changes were the cable operated clutch (was hydraulic), the enlarged radiator, the electric ignition system, the electric brake servo (instead of mechanical which didn't work with stalled engine) and wider tires. All in all the Dino 2400 was a different and better car than its seemingly similar 2-litre predecessor.
As opposed to that of the coupe, the dash of the spider was relatively straight-forward and classic. The convertible top of the spider wasn't completely waterproof and had the tendency to leak. This could cause corrosion of the floor pan of the car since water inside the cockpit wasn't properly drained, a strange omission for a car meant to be driven with the top down.
From 1967 Pininfarina offered a hardtop for the Dino Spider as an extra. This lightweight plastic top was rather expensive so not many were sold and now it's extremely hard to find.