"As is always the case before the start of a season, it's too early to say and we don't want to set a specific target, at least not now", commented team principal Franz Tost in a statement.
What's changing on new cars? The rear of the vehicle also looks more tightly packaged as the team enters its second season with Honda power and bears a resemblance to last year's Red Bull.
"A number of changes have been put in place regarding how we develop the 2019 vehicle, including the approach to how we develop the auto aerodynamically", Egginton said.
The new Toro Rosso vehicle features 2019's biggest two design changes aimed at improving overtaking - a wider and simplified front wing, and higher rear wing.
For 2019 Red Bull has joined Toro Rosso in using Honda power, and Tost believes the senior team's involvement will lead to a more efficient use of its own limited resources, having utilised several 2018-spec Red Bull components on its new auto.
Both teams will have Honda engines after Red Bull Racing ended their partnership with Renault at the end of 2018, with Toro Rosso using some non-listed parts designed for last year's race-winning Red Bull. They know what they're doing.More news: Trump to call for investment in artificial intelligence
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"Toro Rosso, being a smaller team, could not follow the fast development and production process a bigger team can afford, especially considering that the release of the technical drawing could, for whatever reason, be delayed or delivered last-minute". I think we're looking good and I feel that everyone is motivated and focused.
Tost said the new arrangement - which Toro Rosso last used in 2008, when it effectively had an entire vehicle from Red Bull before that practice was banned - would "leave more time for our technical working groups to focus more on the details".
Red Bull's junior team are this year taking advantage of new rules allowing teams to buy parts from rivals.
However there were encouraging signs of potential in the Toro Rosso-Honda package, such as Pierre Gasly's excellent fourth place in Bahrain, and the team's sixth and seventh on the grid at Suzuka when Honda introduced a significant power unit upgrade. "I can see that, and it gives me confidence for the future".
Albon, who finished third in the Formula 2 feeder series previous year, said: "I'll try not to put too much pressure on myself and give it everything I have from day one".